. A manual of zoology. PHYLUM MOLLUSCA 307 nectives, form a ring round the gullet. There are a pair of large eyes situated on the head. In the cuttle-fishes and other Dibranchiata these have a highly complicated structure, --J. Fig. 192. —Sepia officinalis, jaws. A, in situ; B, removed and slightly enlarged. I From the Ca mbridge NaturalHistory .) Fig. 193. — Sepia officinalis, enteric canal, a, anus; b. d, one of the bile ducts; b. m, buccal mass; c, caecum; i, ink-sac; ?'. d, ink-duct; j, jaws; /, /, liver lobes; <:r,cesoph- agus; /, pancreatic appendages': r, rectum; J. g, salivary gland
. A manual of zoology. PHYLUM MOLLUSCA 307 nectives, form a ring round the gullet. There are a pair of large eyes situated on the head. In the cuttle-fishes and other Dibranchiata these have a highly complicated structure, --J. Fig. 192. —Sepia officinalis, jaws. A, in situ; B, removed and slightly enlarged. I From the Ca mbridge NaturalHistory .) Fig. 193. — Sepia officinalis, enteric canal, a, anus; b. d, one of the bile ducts; b. m, buccal mass; c, caecum; i, ink-sac; ?'. d, ink-duct; j, jaws; /, /, liver lobes; <:r,cesoph- agus; /, pancreatic appendages': r, rectum; J. g, salivary glands; st, stomach. (From the Cambridge Natural History.') and contain representatives of all the principal parts of the eye of a fish or other vertebrate. In Nautilus the eye is of 1 This organ is by Sedgwick regarded as renal in its nature, being the unpaired portion of the kidneys. (See Sedgwick's Text-book of Zoology, U PP. 433* 437-). 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 Parker, T. Jeffery (Thomas Jeffery), 1850-1897; Haswell, William A. (William Aitcheson), 1854-1925. New York, The Macmillan Company; London, Macmillan & Co. ,Ltd.
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