156 DOLABELLA. 
with one observed by us at the Isle of France, which we do not 
doubt is a variety of it. Our individual is 9-10 inches long, very 
plump, especially behind, the head being small and oval, a little 
swollen and well distinguished from the foot, the mouth large and 
rounded. The entire body is covered with coarse tubercles and 
papille, some of which are branching; they are most numerous be- 
hind the head. The foot is slightly differentiated from the upper 
surface, and is deep sienna color, with greenish tints in some spec- 
imens; Flanks and back are dirty green mingled with yellow, with 
blackish plaques in some places, especially on the rather rounded 
hind part. Others have brown and yellowish spots on the sides. 
Shell very large, the spire extremely rugose. This mollusk emits a 
great quantity of violet liquid. It was found in great abundance 
during October and November in the warm, quiet waters of the ilots 
aux Cerfs, at Mauritius. 
Compared with the original figure of D. hasseltii, this form is more 
sparsely blotched with dark, and the dorsal slit is much shorter and 
does not extend so far forward. The value of these characters can 
only be decided by a comparison of abundant material. 
D. ELoncata Sowerby. PI. 27, figs. 31, 32. 
Soft parts unknown. Shell oblong, arched, much attenuated, con- 
centrically slightly wrinkled within, radiately subplicated, callus 
spirally plicated, tumid, widely expanded over the back, widely re- 
flected upon the margins as far as the end; terminal margin angu- 
lar, epidermis brown tending to orange. (Sowerby). 
Seychelles (Brit. Mus.). 
D. elongata Sows., Conch. Icon., xvi, pl. 1, f. 2a, b (Oct., 1868). 
It is barely possible that this may be a monstrous example of 
Dolabella rumphit. It presents, however, an appearance so ex- 
tremely different, that it would hardly be just to leave it without a 
name. (Sowbd.) 
D. nempricutt Ehrenberg. 
Six inches long ; warty ; pale green, the posterior corona and two 
dorsal bands olive-blackish and rugulose. Body elongate conic, 
attenuated forward, obliquely truncate and very thick behind, with 
an exactly circular posterior area. Length 6, breadth 24 inches. 
Surface warty, especially in a circle around the posterior area and 
in two bands along the back, the remaining parts being more 
glabrous. Round posterior area bounded by a crispate, contractile 
