l78 OMMASTREPHES. 



O. CRASsus, Lafont, PL 79, fig. 34 T. 



Body and arms thick ; tentacles shorter than the body, the 

 teeth of the small sucker-rings pointed and curved ; fins form- 

 ing an irregular i)arallelograin. tlie u])pei' sides of which are 

 shorter than the lower. Shell narrow. Length, 20 to 24 inches. 



Bay of Biscay. 



Yery closely allied to 0. sagittatus. from which it ditters in 

 size, in the form of the fins, and the denticulations of the rings 

 of the suckers. 



X X Tentacles with four rows of suckers, those of the middle rows larger. 



O. CoTNDETTi, Yerany. PI. 78. fig. 348 ; pi. 79, fig. 349 ; pi. 80, 



figs. 36(), 367. 

 . Bod}- pellucid, cylindrical, slightly fusiform, acuminate to a 

 point posteriorly ; fins heart-shaped, about one-fourth the length 

 of the body ; arms nearly equal ; tentacles a little more than 

 double the length of tlie arms, and nearly as long as the bodj', 

 the subulate ends deprived of suckers. Shell narrow, its cone 

 equally narrow. Total length, including tentacles, 5 inches. 



Mediterranean. 



The shell with nari'ow cone, tlie arrangement of suckers on 

 the tentacles, especially the ends being without any, whilst in 

 0. sagittatus they have eight rows of them, and the differently 

 shaped fins serve to distinguish this species from the latter, 

 with which it has been confounded. 0. Touchardi. Souleyet 

 (figs. 366, 367), is probalily the yoiuig of this species. 



O. .■EQUIPODA, Riippell. PI. 78. figs. :J,48-350 ; ])1. 79. fig. 351; 

 pi. 80. figs. 363-365. 



Body conical-fusiform, acuminate behind ; fins not a quarter 

 the length of the body, short and wide, diamond-shaped ; arms, 

 order of length 3 =^ 4, 1 = 2 ; tentacles nearly double the 

 length of the arms, and nearly as long as the body, the clubs 

 covered with tubercles to their pointed ends, of wliich the 

 middle ones are larger. Shell narroAv, with a slight exiiansion 

 at the cone. Lengtli. including tentacles, 5'() inches. 



Cape Verd Isles ; Mediterrariean. 



Distinguished from O. Goindetn h\ its tentacles, fins and shell. 



