166 HISTIOTEUTHIS. 



with very close acute teeth, longest on the broader side ; tenta- 

 cles twelve times as long as the bod}^, with an occasional sucker, 

 and with a lanceolate elul) covered with peculiar, long peduncu- 

 lated suckers. Shell very narrow; the lowest part with the 

 longest and broadest exjiansion. 



Mediterranean. 

 C. BoNPLANDi, Verany. PL 70, figs. 272, 273. 



Body elongate, conical ; head moderate ; fins half the length 

 of the body, together rhoml)oidal ; sessile arms subulate, with 

 rounded tubercles at the end. unequal, order of length 3, 2, 1, 4 ; 

 tentacles lost ? Shell very narrow in the middle, narrow above 

 and dilated below. 



390 N. lat, 390 W. long., Atlantic Ocean. 



(ienus HISTIOTEUTHIS, Orl.igny. 



H. BoNELLiANA, Per. PI. n, figs. 274-281. 



Body short, obtuse; head very large; head, bod}- and arms 

 covered witli scattered tubercles ; sessile arms unequal, fleshy ; 

 fins semicircular, broad. Shell broad, lanceolate, with a second 

 smaller shell placed on its interior face. 



Total length, 400 mill. ; length of body, 70 mill. 



Mediterraiiean. 

 H. RuppELLii, Verany. PI. 71, fig. 282 ; pi. 72, figs. 283, 284. 



Body, head and arms granular ; head large ; second and third 

 pairs of arms longer ; first and fourth shorter. Shell oval, 

 lanceolate, attenuated in front, acuminated behind ; with a 

 second smaller shell placed on its interior face. 



Total length nearly three times that of H. Bonelliana. 



Medit&)'ra7iean. 

 H. CoLLiNSii, Yerrill. 



A verj^ large and handsome species, with a broad thin web 

 extending between and nearly to the ends of the six upper 

 arms. Tentacles about 2 feet long, slender, the club ])road, oval, 

 bordered by a membrane, and ending in a tapering tip, on the 

 back of which is a keel enlarging backward to the end, where it 

 forms a rounded lobe. The most expanded portion of the chib 

 bears five rows of suckers, with finely serrate rings ; two rows 

 contain much the largest suckers, four or five in each, the more 

 ceuti-al of the two rows containiug four suckers laroer tlmn tlie 



