. The crayfish; an introduction to the study of zoology. Crayfish; Zoology. FiG. 25.—Astacns flnv'mtilis.—The central nervous system seen from above (nat. size), a, vent; «w, antennary nerve ; a! 11, antennulary nerve; e, circumoesophageal commissures ; gn. 1, supracesophageal ganglion; gn, 2, infraoesophageal ganglion ; gn. 6, fifth thoracic ganglion ; gn. 7, last thoracic ganglion ; gn. 13, last abdominal gang- lion ; ces, oesophagus in cross section; on, optic nerve; sa, sternal artery in cross section ; sgn, stomatogastric Please note that these images are extracted from sca
. The crayfish; an introduction to the study of zoology. Crayfish; Zoology. FiG. 25.—Astacns flnv'mtilis.—The central nervous system seen from above (nat. size), a, vent; «w, antennary nerve ; a! 11, antennulary nerve; e, circumoesophageal commissures ; gn. 1, supracesophageal ganglion; gn, 2, infraoesophageal ganglion ; gn. 6, fifth thoracic ganglion ; gn. 7, last thoracic ganglion ; gn. 13, last abdominal gang- lion ; ces, 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. New York, D. Appleton and company
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Keywords: ., bookauthorhu, bookcentury1800, bookdecade1880, booksubjectzoology
