. The crayfish : an introduction to the study of zoology . Crayfish. 5W7- YlG. 25.—Astacvs flnviatilis.—The central nervous system seen from above (nat. size), a, vent; an, antennary nerve ; a'n, antennulaiy nerve; c, ciroumoesophageal oommissvires ; gn. 1, supraoesophageal ganglion; gn. 2, infraoesophageal ganglion ; gn. 6, fifth thoracic ganglion^; gn. 7, last thoracic ganglion ; gn. 13, last abdominal gang- lion ; aes, oesophagus in cross section; on, optic nerve; sa, sternal artery in cross section ; sgn, stomatogastric Please note that these images are extracted from scanned page
. The crayfish : an introduction to the study of zoology . Crayfish. 5W7- YlG. 25.—Astacvs flnviatilis.—The central nervous system seen from above (nat. size), a, vent; an, antennary nerve ; a'n, antennulaiy nerve; c, ciroumoesophageal oommissvires ; gn. 1, supraoesophageal ganglion; gn. 2, infraoesophageal ganglion ; gn. 6, fifth thoracic ganglion^; gn. 7, last thoracic ganglion ; gn. 13, last abdominal gang- lion ; aes, oesophagus in cross section; on, optic nerve; sa, sternal artery in cross section ; sgn, stomatogastric 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 Huxley, Thomas Henry, 1825-1895. London : Kegan Paul, Trench, Tru?bner & Co.
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Keywords: ., bookauthorhuxleyth, bookcentury1900, bookdecade1900, bookyear1906
