182 OMMASTREPHES. 



Doubtful recent species. 

 O. LATiCEPS, Owen. PL 81, fig. 3T(i ; pi. 82, fig. 375. 



Body subgelatinoixs, bluish-white, red and lirown spotted, 

 oval, elongate, ending in an acute point ; arms equal ; tentacles 

 with small cups ; fins thin, rounded, terminal. I unite with 

 this species Granchia perlucida^ Rang (fig. 375), following 

 Gray ; but I see no reason why they should be united, except 

 that they are both very young animals. 



Atlantic Ocean, near the Equator. 

 O. Arabicus, Ehrenbei'g. 



Body round, gradually attenuating into an obtuse round tail ; 

 fins rhomboidal, including half the body and the tail ; arms with 

 two rows of equal cups ; clubs of tentacles with five rows of 

 cups, three middle rows largest ; rings toothed. Shell narrow, 

 cartilaginous. 



Tolcanic island of Ketumbal, Bed Sea. 



Not figured; seems peculiar in possessing five rows of cups 

 on the clubs. 



O. Gronovii, Fer. and Orl». 



Founded on the Sepia of Gronovius Zoophyl. 244. X. 1028, 



whose short diagnosis will suit any species of Loligo or Ommas- 



irephes hitherto described or hereafter to be described. 



Indian Ocean. 

 0. BiANCONii. Yerany. PL 82. fig. oTT. 



Body cylindrical, tapering behind ; fins cordate, depressed, 

 one-half the length of the body ; arms short, of nearly equal 

 length ; tentacles two-thirds the length of the body. Shell with 

 convex margins, terminating in a small cone ; eyes covered with 

 skin. licngth, less than an inch. 



Messina (abundant). 



Kvidently a young animal, the generic relations of which are 

 somewhat uncertain. The form of the animal and shell is very 

 like Onychoteuthis KroJinii. but it wants the tentacular hooks 

 of that species. 



O. Ayresii, Gabb. 



(\arpenter Report, W. C. Mollusca, (U3, 6(i4, 1863. '-San 

 (Uemente Islands." This species was never described by Mr. 

 (iahh. Perhaps 0. Tryonii, Gabb is the same species. 



