Fusus. 433 



capsule, and is considerably spread at its base over the 

 surface to which it is attached. The capsule is composed 

 of an inner and an outer case ; the latter is of a pale 

 yellow colour, opaque, not very glossy, coriaceous, and has 

 a few raised lines across the upper surface ; the former is 

 very thin, and separated from the latter by a parallel, 

 fibrous, silky layer. One of the capsules is nearly an inch 

 in greatest diameter, and contains six embryos, the largest 

 of which is half an inch in length, by one-fifth in width, 

 and has three volutions which perfectly resemble the apex 

 of the mature individual. They are almost cylindrical, 

 coarse, opaque, the last whorl faintly spirally striated, and 

 of a reddish-brown colour." (Ann. Nat.) 



The animal appears to be white, with purple markings. 

 Like that of Norvegicus, it is a true Fusus in all its 

 characters. 



This is one of the rarest and most beautiful of British 

 shells, and was added to our fauna by Mr. Bean, who 

 obtained it from deep water on the Doggerbank off the 

 Yorkshire coast. Mr. Howse dredged it off" the Nor- 

 thumberland coast, in sixty fathoms water, whence it has 

 also been procured by Mr. King. 



Plate CIII. figs. 4, 5, enlarged. 



The fragment, delineated in our engraving, and which 

 has been considered by us as too important to omit, yet in- 

 sufficient to describe from or determine by, was dredged by 

 Mr. M'Andrew, at Zetland, from a depth of eighty fathoms. 

 The Trophon antiquum, var. jugosa, of the " Crag Mol- 

 lusca," exactly agrees with it, but of recent species it bears 

 most resemblance to a pigmy specimen of the F. decem- 



VOL. III. 3 K 



