160 CATALOGUE OF THE MOLLUSCA 
MUREX, Linneus. 
M. erinaceus, Linn. Two or three dead shells of this species 
have occurred, but we think they are probably from ballast. 
Famity. Bucoinipa, Fleming. 
59. TRICHOTROPIS, Broderip and Sowerby. 
1. T. BorzAtts, Brod. and Sow. 
Trichotropis borealis, Brod. and Sow. in Zool. Jour. iv. 375. 
Trichotropis umbilicatus, Thorpe Brit. Mar. Conch. 209, f. 54. 
In deepish water, rare. We have got two or three shells of 
this species from haddocks, and some fine specimens have been 
obtained from the fishing boats at Whitburn by the Rev. G. C. 
Abbes. Mr. Howse also dredged it at that place in 17 fathoms.— 
Found alive in the fishing boats at Cullercoats—<A. H. 
60. PURPURA, Bruguieére. 
1. P. napinivs, Linn. 
Buccinum lapillus, Mont. Test. Brit. 239. 
On rocks between half-tide and high-water mark, common. 
61. BUCCINUM, Linnaeus. 
1. B. unpatum, Linn. (common waved Whelk). 
Buccinum undatum, Mont. Test. Brit. 237. 
Common on all parts of the coast. 
The varieties of this shell are numerous. Three principal 
ones occur on this coast, inhabiting different zones of depth, to- 
gether with a few other forms of less importance. 
Var. 1. Shell rather thin and slender, with the volutions 
rounded, and a strong hairy epidermis: inside 
white, occasionally yellowish or purple. From 
deep water, generally on a muddy bottom. 
2. Shell thick and strong: whorls not much raised 
and strongly undulated : epidermis ‘generally 
wanting : inside white or rarely yellowish. From 
the coralline zone on rocky ground. 
