TROPHON. 317 



and flattened, sloping inwards to a sharp cutting edge : oper- 

 culum yellowish (horneolour in darker specimens), obliquely 

 and irregularly striated in the line of growth. L. 0-625. 

 B. 0-25. 



• Yar. lactea. Milk-white. 



Habitat : Muddy sand in the coralline zone of 

 Devon^ Cornw^all, and Guernsey; Tenby (Lyons); Fish- 

 guard (J. G. J.) ; Isle of Man (Forbes) ; Dublin Bay 

 (Turton and others) ; Cork (Humphreys) ; Arran Isle^ 

 CO. Galway (Barlee) : not uncommon. Other localities 

 have been published ; but I believe T. Barvicensis was 

 in these cases mistaken for the present species. One is 

 oflp the Mull of Galloway, in 145 f. (Beechey). The 

 variety occurs on the coasts of Devon and Guernsey, 

 particularly in ' Hm'd^s Deep/ a submarine trough near 

 the latter island, in about 60 f. Red and Coralline Crag 

 (Wood); ? CO. Wexford (Forbes). The T. muricatus of 

 Nyst, from the Belgian tertiaries, is a different species. 

 Living on the Atlantic coasts of France, Spain, Portugal, 

 the Mediterranean, and ^gean; depths 8-150 f. Dr. 

 Gould enumerated it among the shells of Massachusetts, 

 on what he admitted was unsatisfactory authority ; the 

 lamented death of that excellent zoologist may, I fear, 

 preclude the appearance of the expected new^ edition of 

 his '^ Report,' which would have doubtless cleared up 

 the point. 



The capsules are about a line in diameter, and have 

 an oval orifice ; they contain a purplish liquor, together 

 with the fry. The shell is often incrusted with a fine 

 reddish sponge, regarded by Montagu as an epidermis. 

 My largest specimen is more than four-fifths of an inch 

 long. After the spire has been accidentally truncated, 

 the rest of the shell is sufficient for the animal. 



Phili23pi described it as the Fiisus ecfdnatus of J. 



