Proceedings of the Boston Society of Natural History, Том 27Boston Society of Natural History., 1897 |
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appear arenata b-planes band body-wall Bouvé calcareous Caudina cells Ceratinia circular color-patterns color-variations conidae connective tissue connective-tissue layer Cretaceous cross-fractures Cucumaria Danaidae Danaoid Heliconidae described diameter dorsal edge epithelium Eupterotidae feather-fracture fore wing fossils fracture fringe genera genital genus geology Gryphaea Hamann hind wing holothurians inner rufous inner yellow intestine Island Ithomia Ituna joint-plane joints Jurassic larvae Lepidoptera Linn longitudinal muscle Ludwig Lycorea margin Melinaea Microtus middle black middle yellow Molpadiidae muscle fibers Muskeget Mystic River Mystic River quarries Napeogenes Natural History nerve ring nervures Nolidae Notes nucleus observed Orth outer Outram Bangs ovum Papilios papillae Peru pigment planes Plate posterior probably Proc promethea radial canal radial nerve resemblance rocks Scada scales setae showing side species specimens spots structure surface Synapta tentacles tentacular thorax Thyridia tion Tithorea Translucent tubercles tubules upper volcanic wall wart
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Стр. 257 - Mayer gives the following laws of color pattern: "(a) Any spot found upon the wing of a butterfly or moth tends to be bilaterally symmetrical, both as regards form and color; and the axis of symmetry is a line passing through the center of the interspace in which the spot is found, parallel to the longitudinal nervures.
Стр. 154 - Wacoensis, etc., it must be considered a true Cretaceous form. Its discovery in this connection simply .adds one more to the list of fossils occurring in the Washita division of the Cretaceous of Trans-Pecos Texas, whose close resemblance to well-known Jurassic types would, under any less conclusive evidence of its Cretaceous age, warrant its reference to the Jurassic.
Стр. 255 - The simplest type of color presents itself in the plain uniform tint when the scales are all colored alike, which is comparatively rare. At first the scales growing on the membrane upon or near the veins show a freer development of pigmentary matter, and in this manner would arise a kind of primary or fundamental pattern, namely, a pale ground with darker linear markings...
Стр. 298 - Heliconidae, they display almost -'^ times as many colors; and this is all the more remarkable when we remember that the general class of coloration in the Papilios and Danaoid Heliconidae is apparently the same.
Стр. 125 - A study of an area of schistose or foliated rocks in the eastern United States ; (2) a study of the development of river valleys in some considerable area of folded or faulted Appalachian structure in Pennsylvania, Virginia, or Tennessee ; (3) an experimental study of the effects of...
Стр. 250 - This fact enables the interesting observation to be made, that where a Pierid mimics an insect belonging to another family, the pigments in the two cases are chemically quite distinct.
Стр. 182 - Fig. 10. annexed figure illustrates as we have stated a common character of ranges. To produce such a result must there not be two distinct causes, a force to rupture, and a structure to determine the direction of the lines ? Were there no structure, the force should have produced a fissure in the general direction of the dotted line A B. But instead of this effect it produced a series of parallel lines oblique with this course. We can conceive of such a systematic result only on the ground that...
Стр. 73 - On the Structure of the Immature Ovarian Ovum in the common Fowl and in the Rabbit. To which is appended some Observations upon the Mode of Formation of the Discus Proligerus in the Rabbit, and of the Ovarial Glands or „Egg-tubes
Стр. 271 - ... morphological identity of scales and hairs of insects has been long since settled, so that the question of whether an appendage is a scale or hair has little importance. The extremely minute spines or hairs upon the wings of diptera, hymenoptera, and other insects are simply another form of scales. It is only in insects where certain kinds of brilliant coloration have been developed that one finds scales.
Стр. 13 - I have counted the tentacles of scores of specimens, I have never found an individual with any other number than fifteen. Doubtless the contracted condition of the specimens examined by the earlier investigators led them to overlook some of the tentacles. A prominent cone-shaped genital papilla is situated in the dorsal interradius 3 or 4 mm. behind the ring of tentacles. It was not to be found in the youngest individuals that I examined, which measured about 40 mm. in length. In the adult it is...