AND ACCOUNT OF A NEW SPECIES FROM THE INDIAN SEAS. 27 
and Pteropods with the more elevated forms of Vertebrata. It possesses characters 
hitherto known only in the Testaceous Cephalopods, with others common in the Naked 
species ; and it establishes on unequivocal characters the existence of a genus hitherto 
regarded as doubtful. The structure of its eyes is not less remarkable than the con- 
dition of the tentacula, and the great development of its longitudinal dorsal nerves. In 
the smallness of the space occupied by the viscera in its capacious mantle, it more re- 
sembles a Cho among the Pteropods than the ordinary forms of this class. No other 
Cephalopod has yet presented a spiral stomach like that of Loligopsis, or similar tubercles 
on the mantle; and the form and mode of termination of the pancreatic and hepatic 
ducts in a capacious undivided stomach are also peculiar. In its fasciculus of vesicles 
on each branchial artery, the want of appendix to the branchial auricles, the structure 
and position of its systemic ventricle, and the origin and distribution of its arterial 
trunks, it differs from any known form of Naked or Testaceous Cephalopods, though 
partaking of the characters of both. 
EXPLANATION OF THE FIGURES OF LOLIGOPSIS GUTTATA. 
PLATE Ii. 
Fig. 2. Entire animal, back view, natural size. 
Fig. 3. Entire animal, front view, natural size. 
Fig. 4. Front view of the digestive and other abdominal viscera. a. wsophagus ; 
b. gizzard ; c. spiral stomach; d. anus; e. e. e. e. lobes of the liver; f. ink gland; 
g. ovarium ; h. h. inner surface of the lateral tubercles ; k. syphon laid open; 1. 1. rudi- 
mentary tentacula. 
Fig. 5. Front view of the nervous and vascular systems in situ. a. cesophageal gan- 
glia; b. great dorsal ganglia; c. great dorsal nerves; d. vena cava; e. its vesicles ; 
f. f. branchial hearts preceded each by a cluster of vesicles; g. g. hepatic ducts ; 
h. pancreatic glands. 
Fig. 6. Nervous system, and organs of vision. a. supra-cesophageal or cerebral gan- 
glion ; b. sub-cesophageal ganglion ; c. optic nerve; d. peduncle of the eye; e. e. great 
dorsal nerves ; f. f. their ganglia. 
Fig. 7. Hepatic and pancreatic organs. a. a. a. a. four lobes of the liver; b. hepatic 
ducts ; ¢. pancreatic glands; d. opening of the hepato-pancreatic duct ; e. crop ; f. giz- 
zard ; g. spiral stomach ; A. intestine. 
Fig. 8. Vascular system. a. a. a. a. vesicular bodies of the vena cava and branchial 
arteries ; b. b. cluster of vesicles surrounding the entrance of the branchial arteries into 
the auricles; c. c. branchial auricles; d. d. branchial arteries; ¢. e. branchial veins ; 
f. systemic ventricle ; g. anterior or ventral aorta going to the anterior parietes of the 
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