PHILINID^. 353 



Phaneropthalmus, a. Ad. 



Syn. — Xanthonella, Graj^ 



Distr. — P. lideus, Quoy (Ixxxvii, 18, 19). 



Shell oval, convex, pointed behind, columella-margin with a 

 curved process. Animal long, c_ylindrical, head with short ten- 

 tacular lobes, eyes in middle of disk, lateral lobes enveloping. 



Cryptophthalmus, Ehrenberg. 



Bistr. — G.olivaceus^Yjhv. (Ixxxvii, 20). Red Sea. 



Shell scarcely convolute, fragile, oval, convex, without spire 

 or columella. 



Animal semicylindrical, head with short tentacular lobes, eyes 

 small, concealed under the lateral margins of the head, mantle 

 and lateral lobes enveloping the shell. 



Philinopsis, Pease, 1860. 



Dist7\ — 2 sp. Sandwich Isles. P. speciosa, Pease. 



Shell white, fragile, pellucid, with a curved callous apex. 

 Head-disk large, oblong-oval or triangular, not extending in 

 advance of the foot ; body truncated behind, and the truncation 

 surrounded by an undulated or crenated crest ; eyes not visible ; 

 mouth proboscidiform between cephalic disk and foot, with or 

 without one pair of tentacles on sides of the mouth ; foot large, 

 rounded and reflected at the sides ; branchial plume near the 

 posterior end of the body, and curving around between the 

 truncated end of the foot. 



Volvatella, Pease. 



Distr. — V. fragilis, Pease. Sandwich Islands. 



Shell convolute, subpja-iform ; aperture wide anteriorly, con- 

 tracted posteriorly and produced, forming a circular aperture. 



Animal. Mantle concealed ; cephalic disk quadrate ; tentac- 

 ular lobes produced from the corners ; anal aperture posterior ; 

 foot small and triangular. 



LiNTERiA, A. Adams. 



Syn. — Smaragdinella, A. Ad. Glauconella, Gray. 



Example. — L. viridis, Rang (Ixxxvii, 21). 



Shell oval, depressed, slightly spiral, greenish ; aperture very 

 large, canaliculated behind ; inner lip with a spiral spoon-shaped 

 process. 



Animal partially investing the shell ; eyes sessile on the middle 

 of the frontal disk ; mantle included within the shell, ending 

 posteriorly in a thickened lobe; foot with the side-lobes free, not 

 united to the head, enlarged in the form of wings which unite 

 behind and cover a portion of the shell. 



Amphibious, living on moist I'ocks within reach of the spray, 



