sKPiA. 1!>:5 



J)'OrT)ioiiy suijfiivsls tlmt lliis iii;iy -^ S. hierredda^ Rang; it 

 certainly rost'iiihlcs it. pjirt iciilarly tlic shell; hut there is a still 

 greater external rcscMiihhincc to H. tnhercHhiht . although the 

 shells are ditfercnt. The tiiherclcs of the lattei- may he due to 

 irritation only, and the diltt'i-cnccs of clips ami shell arc possilily 

 only sexual. 



S. Andrkaxa. Steenstiaip. IM. 8*». fig. 4()S ; pi. DO. tigs. 4011, 410. 

 Body long, pointed l»ehiud ; tin.s nai'row ; second ])air of arms 

 nearly doul)le the length of the others, and their extremities 

 Avith the cui)s in two scries instead of four; tentacles rather 

 short, cylindrical, with thick, shoi-t clubs and five rows of 

 suckers, four in the middle row being much larger. Slu-ll nai'row, 

 elongated, witli a recurved rostrum. 



flapan. 



Not unlike S. Brrtheloti in general appearance, but differs 

 from all other species in the great length of the second pair of 

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

 its nearest relation being ,S'. elom/afrt. 



* * Oiqys of tentacuhir anas in five or six series, si/b-erpml, moderate sized. 



t Shell oblong. 

 S. Lycidas, Gray. 



Sessile arms witli four series of rather large e(i[ual cups ; ten- 

 tacles elongate, the clul) distinct, slightly finned behind, with 

 five series of cups : those of the middle equal sized, nearly the 

 size of those on the sessile arms ; of the lowei' and upper end 

 smaller. Shell oblong, rather elongate, slightly |)ro(luced above, 

 narrowed, produced and rounded behind; apex l)lunt. (*avit\- 

 with a strong, raised, I'ounded ridge on each >iide behind ; disk 

 convex, with a In-oad central concavity extending nearly the 

 whole length. 



Ghina. 



Descril)ed from a specimen in Brit. Mus. oldained salted in 

 the market of Canton. 



f f Shell elongate, narrow. 

 S. Behtheloti. Fer. and Orb. PI. 90, figs. 411, 412. 



Body oblong, elongated, subcylindrical. smooth, blunt behind 

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



