. Chimæroid fishes and their development. Fishes; Chimaeridae. 82 CHIMyEROID FISHES AND THEIR DEVELOPMENT. the yolk, and here at various points yolk nuclei are clustered, havint; evidently an important i)hysioloi;ical relation with the overlying blastoderm ; we note at a a tongue of mesoblast cells which ])roiects median ward; this occurs but in a few sections, and evidently corresponds to the dark ai-ea noted in surface view; it resembles, however, so closely the "lame intermediaire" (Swaen and Brachet). -o-e^^^SB^e "'..0.,° ®, % ovT-a^^"" n ^ 8 i (\ 0 0° ^.ajd;;Xif&q
. Chimæroid fishes and their development. Fishes; Chimaeridae. 82 CHIMyEROID FISHES AND THEIR DEVELOPMENT. the yolk, and here at various points yolk nuclei are clustered, havint; evidently an important i)hysioloi;ical relation with the overlying blastoderm ; we note at a a tongue of mesoblast cells which ])roiects median ward; this occurs but in a few sections, and evidently corresponds to the dark ai-ea noted in surface view; it resembles, however, so closely the "lame intermediaire" (Swaen and Brachet). -o-e^^^SB^e "'..0.,° ®, % ovT-a^^"" n ^ 8 i (\ 0 0° ^.ajd;;Xif"5B»-'ipt«w^ ijSV i. ^%fi»«k;:mf#"-^'' Figs. 71 F-I. (For description and lettering see page 81, A-E.) in the teleost, that, if for no other reason, we are led to suggest that it represents the precocious beginnings of the excretory system. In e the notochord has sepa- rated from the yolk, the gut lumen becomes narrowed, and lateralward the first trace of a body cavity {be) appears. We observe that the margin of the gut passes directly into yolk-entoderm, the distinctness of its lower boundary having. 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 Dean, Bashford, 1867-1928. Washington, D. C. , Carnegie Institution of Washington
Size: 1977px × 1264px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectfishes, bookyear1906
