11)6 SEP I A. 



oblong, elongate, straight, compressed, wrinkled above, obtuse 

 anteriorly, winged posteriorly. Length. X inches. 



W. Coast of Africa. 



S. TNKinns. Hasselt. 1M. ( . 1 . %. 42:5; PI. 92. figs. 424-429. 

 ' Body oblong, smooth, blunt behind ; tins narrow in front, 

 rather wider behind, beginning behind the front edge; cups of 

 arms small, the rings entire on the narrow, and finely toothed on 

 the broad edge ; tentacles long, slender, without any distinct 

 club, slightly impressed at the top externally, the cups very 

 minute or entirely wanting. Shell oblong, elongate, straight. 

 rounded, acuminate in front, hinder end not beaked above, ex- 

 panded and produced into a cartilage behind ; convex beneath. 



with a strong central groove. 



India; China. 



I include the two species S. &/WP//.S/S and S. microcheirux of 

 Gray, as 1 do not find any appreciable difference: I also include 

 S. affinis (fig. 426) and S. Toarannen,xi.x (figs. 427-429) of Sou- 

 leyet. from Cochin China, which appear to me to be the young 

 of the same species. 



1 1 1 Shell oblong, rounded behind, beaked. 



S. ROSTKATA. d'Orb. 1*1. U.'l, figs. 4:>0-4:>2. 



Body thick, rounded, narrow before, obtuse behind ; fins thick, 

 narrow in front, dilated behind ; arms elongate, slender, unequal, 

 order of length 4. :>. 2, 1. the cups spherical, with very small 

 smooth-edged rings ; tentacles lanceolate, with very small numer- 

 ous equal-sized cups in many lines and with toothless rings. 

 Shell ovate, oblong, tuhcrcularly wrinkled, depressed, broader 

 in the middle, narrow behind, with an elongated, compressed 

 beak; convex in front, concave and with a diaphragm behind. 



Length. 1 1 inches. 



Indian Ocean ; Australia. 



With remarkable similarity between the shell of this species 

 and that of S. aculeata . t here is some difference in the outline 

 of t he animal and in the rings of the suckers. I include S. Blain- 

 nillri. the name of which was changed to S. Indira, because the 

 former was preoccupied by Deshaycs for a fossil species: the 

 latter however, proves to be a synonym, so that S. Blainvillei. 



