. Zoology for high schools and colleges. Zoology. EMBBTOLOOT OF 0NIS0U8. 387 shaped, widest behind, extending a little behind the middle of the body. The intestine is about one half as wide as the stomach. Certain Isopods possess segmental Kg. 251—Dissection of/Ssrofe to show the neiTous system.—Dissected and drawn by J7 S. KiDgsley. There is no ccecal enlargement, and no "urinary" tubes. The sexes are distinct. The young are hatched in the form of the adult, there being no metamorphosis. The development of the pill-bug, Onisous murarius, is probably typical of that of most
. Zoology for high schools and colleges. Zoology. EMBBTOLOOT OF 0NIS0U8. 387 shaped, widest behind, extending a little behind the middle of the body. The intestine is about one half as wide as the stomach. Certain Isopods possess segmental Kg. 251—Dissection of/Ssrofe to show the neiTous system.—Dissected and drawn by J7 S. KiDgsley. There is no ccecal enlargement, and no "urinary" tubes. The sexes are distinct. The young are hatched in the form of the adult, there being no metamorphosis. The development of the pill-bug, Onisous murarius, is probably typical of that of most Tetradecapods and Deca- Fig. 252—Transverse section of Serolis. t, t, tergum ; », s. stemnm; em, epime- rnm; es, episternnm, at insertion of the legs.—Prepared and drawn by Kings- ley. pods (Bobretzky). The first change after fertilization is the origin of the formative or primitive blastodermic cells at one. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Packard, A. S. (Alpheus Spring), 1839-1905. New York, H. Holt and Company
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectzoology
