178 OMMASTREPJI K-. 



O. CKASSUS, Lafont. PL 79, fig. 347. 



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



teethol'thc small sucker-rings pointed :ind curved; fins form- 

 ing an irregular parallelogram, the upper sides of which are 

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



Bay of Biscay. 



Very closely allied to 0. sagittatus, from which it diil'ers in 

 si/e. in the form of the fins, and the dcnticnlations of the rings 

 of the suckers. 



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

 O. CoiNDETll. Verany. PI. 78. fig. 348; pi. 79, fig. 349; pi. SO, 



tigs. 366, :;r,7. 



IJody pellucid, cylindrical, slightly fusiform, acuminate to a 

 point posteriorly: tins heart-shaped, about one-fourth the length 



of the hody : arms nearly equal ; tentacles a little more than 

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

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

 equally narrow. Total length, including tentacles. ~> inches. 



Mediterranean. 



The shell with inn 1 row cone, the arrangement of suckers on 

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

 U. aagittatus they have eight rows of them, and the differently 

 shaped tins serve to distinguish this >peeies from the latter, 

 with which it ha- been confounded. (). Tu<-1nir<l i . Souleyet 

 dig-. 366, :;i;T). is probably the young of this specie-. 



d. JBQ1 ii A. Uiippell. I'l. 7*. ftgg. 348 -3501 I' 1 - "' "V- :;:>1 - 



pi. so. Bgg. 368 865. 



IJody conical-fusiform. a<-timinate behind ; tins not a quarter 

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

 order of length :i 4. 1 =2; tentacles nearly double t he 



length of the arm-, and nearly as long as the body, the clubs 

 covered with tubercles to their pointed cud-, of which the 



middle ones are larger. Shell narrow, with a slight expansion 



:it the cone. Length, including tentacles. .Vr, inches. 



Cape Verd Isles ; Mediterranean. 

 Distinguished from 0. G'"/ /*'/'/// by its tentacle-, fins ami shell. 



