SKPIA. 197 



Fer. and Orb., could be properly used if it were not the same 

 species MS $. roxlrafa ; which has priority over all. 



S. RKOURVIROSTRA. Steenstrup. 



The rostrum of the shell is recurved into a form somewhat 



like that of an interrogation mark. 



China. 

 S. HRKVIMANA, Steeiistni j). 



Very similar to S. rostrata. but differs in its much shorter 

 tentacular arms. Possibly a young animal. 



Neither this species nor S. recurviroxtra have been sufficiently 

 characteri/ed or figured. 



8. MYRSUS, Gray. 



Animal unknown. Shell oblong, the hinder extremity rather 

 produced, shelly, with a slight thickening within; apex blunt, 

 rather produced, inner surface suddenly thickened, the upper 



half convex, witli a slight central depression. 



China . 

 Described from a Brit. Mus. specimen; not figured. 



S. MESTUS. Gray. 



Animal unknown. Shell oblong, rounded behind; cavity nar-. 

 row behind, rapidly widening (surface destroyed); apex elon- 

 gated, acute, recurved, shelly. 



Australia. 



Another Brit. Mus. specimen, with a worthless diagnosis and 

 no figure. 



Sessile arms with equal small cups ; upper pair with two rows of cups. 



S. RUPELLARIA, d'Orb. PI. 93, figs. 433-437. 



Body ovate-oblong, elongate, smooth, acuminated anteriorly ; 

 fins very narrow ; head smooth ; arms short, nearly equal, length 

 4, 3, 1, 2 ; cups spherical, oblique, in two rows on the dorsal pair 

 and on the bases of the others, and in four rows on their ends ; 

 tentacles long, with five series of small cups and three much 

 larger ones, with the rings rather oblique and toothed. Shell 

 elongated, arched behind, very narrow, winged and pointed in 

 front, very narrow and winged behind, with a medial external 

 crest. Length, 5 inches. 



Europe ; Great Britain to Mediterranean ; Malaga. 



