238 RET. B. B. WATSON ON THE 



on botli faces ; outline trapezoidal, the front and back lines 

 being fairly parallel, though somewhat converging upward (». e. 

 where the head of the animal would be) ; the lower edge is 

 rounded; the top of the shell is produced into a short oblique 

 wing-like extension, from which four to six short small bluntish 

 points project. This wing-like projection slopes downward to the 

 left towards the somewhat unformed nuclear top of the pillar, from 

 which it is separated by a small rounded sinus with a reverted 

 edge ; below the nuclear pad the lip-edge is broadly but shortly 

 reverted, leaving behind it on the left a well-marked very oblique 

 umbilical furrow ; the whole mouth-edge is strong ; the front face 

 of the shell is slightly concave, the back is rather flatly convex. 

 The surface of the shell is somewhat rudely marked by lines of 

 growth, and microscopic, close-set, faint, regular longitudinal 

 markings can just be traced ; the colour is translucent white, 

 only the embryonic knob is brownish and of a limy texture. 



The living animal I never found, and only four minute shells 

 presented themselves in dredgiugs of 50 fms. from Punta de Sao 

 Lourenco, whence the specific name is taken. — L. 0"06. B. O036. 

 They are probably Doridiums. Of the four specimens, two 

 were unfortunately lost by a friend. 



7. DOEIDITTM MADEEENSE, U. Sp. (FigS. 7, 7 «, 7 b.) 



Body about half an inch in length and a third of an inch in 

 breadth ; it is well arched ; the foot is oval in contour, with the 

 mantle-covered square-fronted body just perceptibly projecting 

 in front ; while the tail, which is short, square, abruptly truncated, 

 hardly bifid, but with a slight tubercular prominence at either 

 corner, is more prominent behind ; there is no flagelliform 

 appendix ; the entire head is covered by the unbroken mantle 

 which extends over the body, either side of which is inlapped by 

 the mantle-flaps, as in Philine ; in the substance of the tail the 

 shell can be distinctly seen with the spire directed towards the 

 animal's head, while in the body, rather on the left side, can be 

 traced (what is apparently the stomach and entrails) a slightly 

 opaque, elongately oval substance defined by a brownish outline, 

 but varying slightly in form and position. I failed to detect 

 either the branchial plume or the vent, though there is no mem- 

 branous lobe to hide these as in D. carnosum, Cuv. (see Veyssiere, 

 Tectibranches, p. 48, pi. ii. 42). Colour : the whole animal is 

 opaque (or rather not quite translucent) white, dotted, especially 



