SKIM A. iy: j > 



D'Orbigny suggests that this may == S. hierredda. Rang ; it 

 certainly resembles it. particularly the shell ; but there is a still 

 greater external resemblance to #. luhrrcululd. although the 

 shells are different. Tlie tubercles of the latter may be due to 

 irritation only, and the differences of cups and shell are possibly 

 only sexual. 



S. A.M>KKA.\A. St CCllst I'll p. PI. 8<>. fig. 4<)S ; pi. <)(). figs. 40!>, 410. 



Body Ion" 1 , pointed behind ; fins narrow ; second pair of arms 

 nearly double the length of the others, and their extremities 

 with the cups in two scries instead of four ; tentacles rather 

 short, cylindrical, with thick, short clubs and live rows of 

 suckers, foui' in the middle row being much larger. Sheil nan >w. 

 elongated. with a recurved rostrum. 



Japan. 



Not. unlike ,S'. Jli-rf/K-loli in general appearance, but differs 

 from all other species in the u'reat length of the second pair of 

 arms; the shell resembles no other in this section of the genus, 

 its nearest relation beino; >S. < j /ti/n/<tf(i. 



* Cups of tentacular urm^ in five or six series, sub-equal, moderate sized. 



f Shell oblong. 

 S. LYCIDAS. dlrav. 



Sessile arms with four series of rather large equal cups ; ten- 

 tacles elongate, the club distinct, slightly finned behind, with 

 five series of cups: those of the middle equal sixed. nearly the 

 si/e of those on the sessile arms; of the lower and upper end 

 smaller. Shell oblong, rather elongate, slightly produced above. 

 narrowed, produced and rounded behind; apex blunt, cavitv 

 with a strong, raised, rounded ridge on each side behind ; disk 

 convex, with a broad central concavity extending nearly the 

 whole lenu'th. 



China. 



Described from a specimen in Brit. Mus. obtained salted in 

 the market of Canton. 



f f Shell elongate, narrow. 

 S. BERTHELOTI, Per. and Orb. PL !>(). figs. 41 1. 41:2. 



Body oblong, elongated, subc\lindri*al. smooth, blunt behind 

 and pointed in front; fins narrow, broader behind; ears simple; 



