1899.] NATURAL SCIENCES OF PHILADELPHIA, 515 



also seems to be different. Aplysia pulmonica var. Tryoniana 

 Pilsbry appears to be closely allied, and is recorded from Upolu, 

 but has a starlike pore in the mantle, a much more solid shell, 

 and no ocelli, and, to judge from the figure, differs in its general 

 shape. Another species with points of resemblance is Aplysia 

 dactylomela, from Bermuda and the Cape Verde Islands, of which 

 I have examined a specimen. But it differs in having ocelli with 

 a yellow centre, a louger interval between the epipodia and rhino- 

 phores, the epipodia not united posteriorly, the tail not black and 

 another form of teeth. The central tooth is unicuspid and the 

 laterals also have only an inner and not an outer cusp. 



My specimens, therefore, appear to me not to coincide with any 

 described species of Aplysia, and, if this proves correct, I would 

 propose to call them Aplysia Benedidi. 



Dolabella Hasseltii Ferussac. PI. XIX, fig. 3, 



There is found in abundance at Apia, a species of Dolabella, 

 which is eaten by the natives, and which seems to be identical with 

 Dolabella Hasseltii, and particularly with the variety described 

 and figured by Quoy and Gaimard (Voy. de l' Astrolabe, Vol. II, 

 p. 306), though, if so, the coloring of their plate is not good. 



The animal, which is heavy and sluggish in its movements, is 

 generally found among seaweed growing on sand. When annoyed 

 it excretes a copious purple fluid. The body is about six inches 

 long and much broader behind than in front. The posterior disk 

 is very large and distinctly marked oflf^. It is fringed with ragged 

 processes. The epipodial lobes are concrescent in front, the line of 

 junction forming a spermatic groove, and touch one another, though 

 they are not concrescent, in the region above the mantle, where 

 they form a dorsal slit with two wider openings, one anterior above 

 the ctenidium and one posterior above the excurreut siphon. 

 Color olive-green with dark brown and sandy patches admirably 

 imitating a mass of old seaweed. Though the animal is a con- 

 spicuous object if put in a basin, it is, thanks to its protective 

 coloration, almost invisible in its native haunts. The foot is dark 

 orange. The cavity surrounding the shell and mantle is large. 

 The mantle greenish and only partly covering the shell and the 

 large pale flesh-colored ctenidium. The shell is large and strong, 

 hatchet-shaped, the edge of the blade membranous, but the spire 



