216 OSCANIUS. 



bronzed color. These may perhaps be features of immaturity. It 

 occurs commonly at Palermo. 



O. DILATIPES H. & A. Adams. PL 54, figs. 4, 5. 



Pale red, with deep red-brown depressed lines, and light pink 

 tubercles surrounded by dark red-brown zones; the foot is flesh- 

 colored, with faint concentric stride (H. & A. Ad). 



Habitat unknown. 



Oseanius dilatipes ADS., Gen. Rec. Moll., ii, p. 39, pi. 60, f. 5, 5a. 



Described without locality from a spirit specimen in Cuming's 

 collection. Seems near 0. tuberculatu* Meckel. 



O. RETICULATUS Rang. PI. 49, figs. 36, 37, 38. 



Body oval-oblong, convex, smooth, obtuse in front, subacute be- 

 hind. Flesh colored, the shade deeper on the mantle, where there 

 are, especially toward the borders, numerous rounded, slightly 

 nebulous black spots of varying sizes, and a reticulation of fine white 

 irregular lines. Mantle with a median sinus in front; eyes at the 

 posterior bases of the tentacles, which are brown, long, swollen at 

 the distal third, and regularly striated transversely. Foot large, 

 oval, pale. Gill transparent yellow. Length 1\ cm. 



Shell small, oblong quadrangular, concave below, convex above ; 

 right and anterior borders thin, left border thickened and terminat- 

 ing in a small, distinct spiral of 1* whorls (fig. 37) ; regularly stri- 

 ated, of corneous texture, reddish below, bluish above. Length 7 

 mill. 



" lie, da Prieur, dans la bale de Saint- Antoine" (Rang). 



Pleurobranchus reticulatus RANG, Mag. de Zool., 1832, Classe v, 

 pLl. 



I do not known the locality given by Rang. Perhaps it is San 

 Antonio Bay, Prince's Island, W. Africa, or San Antonio de Praia, 

 Annobom Island. 



Keiaart has very briefly described a "P. reticulatus?, Gmel." 

 from Trincomalee. See Ann. Mag. N. H., (3), iii, p. 495. 



O. MARINUS Forskal. PI. 48, figs. 32, 33. 



Color dark violet, with two (or three) interrupted longitudinal 

 series of entirely white, lunate curved, narrow lines on each side of 

 the back, each series consisting of 4 or 5 such lines. The mouth 

 can be protruded trunk or snout like, the snout being yellowish. 

 Over the mouth there is an expansion of the integument, or labial 



