264 Messrs. Alder and Hancock on new Mollusca. 



on the centre of the back, and one or two imperfect rows at the 

 sides. Branchial plumes three, tripinnate, tipped with yellow. 

 Foot narrow, produced a little at the sides in front. 



Length (in spirit) -^ inch. 



This interesting addition to our fauna was dredged among 

 Zostera, in a few fathoms water, in Moulin Huet Bay, Guernsey, 

 by Mr. Norman, in July 1859. 



Family Eolididas. 

 Do to cuspidata, n. sp. 



Body nearly linear, slender, smooth, white or yellowish, spotted 

 on the back with pink or purple, the spots forming two lines of 

 curves between the branchial processes, bending towards each, 

 and extending from the tentacles to near the tail. Tentacles 

 filiform, slender, tapering a little upwards; the sheaths trumpet- 

 shaped, with scalloped margins, extending into a point in front. 

 Veil entire, arched in front, and produced into obtuse recurved 

 points at the sides. There is a raised portion of the surface in 

 front of each tentacle, as in D. fragilis. Br and dee six pairs, 

 rather distant; the first pair placed not far behind the tentacles, 

 the last pair very small. They are ovate-conical, with four 

 whorls of strongly pointed conical tubercles, and a terminal one 

 at the apex; apices without spots. Foot narrow, a little ex- 

 panded in front, and tapering to a point at the tail. 



Length (in spirit) a quarter of an inch. 



Dredged in deep water on the outer Haaf, Shetland, by 

 J. Gwyn Jeffreys, Esq., and Edward Waller, Esq., in the summer 

 of 1861. 



This new species of Doto is somewhat intermediate in character 

 between D. fragilis and D. coronata, but approaching more 

 nearly to the latter, from which it differs in the conical form of 

 the branchial processes and their more pointed tubercles, as well 

 as in the absence of the dark spots at their apices. The tenta- 

 cular sheaths, too, have scalloped margins, and the veil is more 

 arched than in D. coronata. 



Family Limapontiada?. 

 Limapontia depressa, n. sp. 



Body oblong-ovate, depressed, swelling behind the centre and 

 terminating in a blunt point posteriorly, but varying much 

 according to the degree of expansion or contraction ; black, with 

 minute yellowish-white spots or freckles, not always present, and 

 very inconspicuous. Head rounded in front, and slightly angu- 

 lated at the sides ; the lateral crests less elevated than in L. nigra, 

 with the eyes situated near the centre of a white oblong area at 



