SKPIA. 191 



concave, more enlarged behind and acuminated in front ; its 

 want of thickness gives it an entirely peculiar appearance. The 

 eggs are small, not exceeding 8 mill, diameter. 



France ; Bay of Biscay ; Mediterranean. 

 This species has not been figured. 



S. KOUXII, D'Orb. PI. 87, figs. 394-397. 



Body smooth, ovate, rounded posteriorly ; lins broad ; head 

 smooth, buccal membrane with five prominent lobes ; arms elon- 

 gate, unequal, order of length 4, 3, 2, 1, the rings of the cups 

 with long, acute teeth on their border side ; tentacles with six 

 rows of cups, the two middle rows composed of seven very large 

 cups, the rings armed all round with short teeth. Shell ovate, 

 oblong, wrinkled and tuberculated, thickened underneath poste- 

 riorly, with a short blunt beak, and a very thick convex dia- 

 phragm occupies all the extremity of the cavity. 



Length, 25 inches. 



Red Sea ; Indian Ocean. 



S. YICELLIUS, Gray. 



Blackish, smooth ; arms thick, the lower rather larger, cups 

 rather large, with entire rings ; tentacles moderate, slightly 

 finned, the cups smaller than those of the sessile arms, in five 

 rows, five or six of those in the central line about treble the size, 

 with dark rings very minutely and bluntly toothed on the edge. 

 Shell oblong, rather attenuated above, dilated behind ; apex blunt, 

 not produced beyond the horny part at its base ; back rugose, 



subconcentric. 



Habitat unknown. 



Described from a specimen in Mus. Brit., and not figured. 



S. HIERREDDA, Rang. PL 88, tigs. 398, 399. 



Body ovate, depressed, rather tuberculate ; fins broad ; head 

 with a beard on each eye ; ear witli a longitudinal and trans- 

 verse ridge ; arms thick, unequal, order of length 4, 3, 1, 2, 

 rings of cups with small teeth all round ; tentacles with very un- 

 equal cups in six rows, the middle ones being very large, and 

 the rings entire. Brown and yellow marbled, with indefinite 

 white spots and a series of six white lines on the sides. Shell 



