LOTJGO. 145 



but fins are longci' ; diHers from L. Duvaucelu in the fins being 

 longer, and the shell broailer. with a narrow stem. 



Indian Ocean. 

 L. OiiTNENSis, Gray. 



Bod}' subeylindricai, acuminated behind, with rliomboidal fins. 

 Rings of the cups of the ventral pair of arms with many close, 

 acute teeth ; tentacular arms with numerous rather large cups 

 and some rather small ones at the tip, rings witii distant teeth. 

 Shell broad-lanceolate with a sliort, broad stem. Eaten in Canton. 



Not figured. 



China. 



L. SiMATRENSis, Fer. and Orb. PL 58, figs. 190, 191 



Bod}' short, cylindrical, attenuated behind ; fins regularh' 

 rhomboidal, truncated in front, angles' rounded, nearly half the 

 length of the body ; arms moderate ; tentacles very long and 

 slender. Shell oblong, spoon-shaped ; upper part rather narrow 

 and produced. Placed by Gray in his genus Teuthis, but evi- 

 dently a true Loligo. 



Sumatra. 



L. VULGARIS, Lam. 



From this common European species have been separated by 

 the minute perception of modern naturalists, a number of so- 

 called specific forms, the distinctness of which appears to me to 

 be problematical. The characters, which are comparative, may be 

 individual only, in their strict limitation, or they may, perhaps, 

 indicate varieties or even sub-species. I give the table of dis- 

 criminative characters constructed by Lafont, and proceed with 

 the descriptions of these forms. 



A. Fins shorter than half the length of the body. 



L. Alkssandiunii, L. Meneghinii, L. pulchra. 



B. Fins longer than half the length of the body. 



* Cups of the tentacles very unequal. 



Eye small. L. afpinis. 



Eye moderate. 



L. BREVICEP8, L. NEGLECTA, L. MICROCEPHALA. 



Eye very large. L. vulgaris. 



* * Cups of the tentacles nearly equal. 



Eye small. L. Forbesii. 



Eye very large. L. macropthalma. 



19 



