260 
The presence of a muscular mantle (m), enveloping a 
cylindrical or pouch- shaped body, to which anteriorly is 
attached a well-developed head (h), furnished with a pair of 
complex eyes (e), the lobes (brachia) of the so-called foot 
(aaa) are arranged in a circle around the mouth, which latter 
organ is armed with a pair of horny, bird-like mandibles (b), 
which work vertically. In the ventral region a fold of the 
mantle is prolonged into a funnel or siphon (r.)* 
r 
GENERAL FORM AND RELATIONS OF THE INTERNAL PARTS. 
Fig. 3 is a diagram of the internal anatomy of a Cuttle 
Fish. The buccal mass (a), and the horny mandibles (b), 
along with the fleshy tongue or odontophore, with its siliceous 
radula, crown the long oesophagus or gullet ; it is into this 
latter organ that the salivary glands (d) pour their secretion. 
The stomach (e) is connected anteriorly with the alimentary 
canal, and posteriorly with the plyloric coecum (f), the liver 
(i) is connected with this organ by its hepatic ducts, the 
pyloris is continued to the intestine (g), which, bending upon 
itself, has its flexure neural, that is towards the nerve 
masses, and away from the heart (n) ; the intestine opens by 
the anus (h) into the mid- ventral region. Close by the orifice 
of the anus is that of the ink-bag (k), an organ, however, 
which is only found in the Dibranchiates. The position of 
the generative organs is indicated by the letter (o), and that 
of the plume like gills on the one side, by the letter (m). 
* For description of the general anatomy of the Cephalopoda, see " The 
Anatomy of Invertebrated Animals," T. H. Huxley, Lon., 1877 ; and " Forma of 
Animal Life," by George Eolleston, Oxford, 1870. For classification, &c., see 
Manuel de Conchyliologie," Tome 1, J. Chenu, Paris, 1859; "Mollusques Vivants 
et Fossiles, Cephalopodes," A. D'Orbigny, Paris, 1855, and " Manual of the 
Mollusca," with appendix by Ralph Tate, S. P. Woodward, Lon., 1871. For 
description of Species, see " A Description of British Mollusca and tlieu' Shells," 
E. Forbes and S. Hanley, Vol. iv., Lon., 1853. " British Conchology," by J. G. 
Jeffreys, Vol. v., Lon., 1859. " Conchologica Iconica," " Lovell Reeve, Mono- 
graphs on Nautilus and Argonauta," Lon., 1861. " Mollusques Meditn. Cephalo- 
podes," J. B. Verany, Genoa, 1851 ; and " Histoire Natui-elle des Mollusques, 
Monographic Cephalopodes," Ferrusac et D'Orbigny, Paris, 1834-5. 
