178 



TrOPHON CLATHIiATUS (L.). 



Murex clathratus, L. (1767). 



Fusus scalariformis, Gould (1838 and 1841). 



Trophon scahiriforriii.% Stimpson (1860) ; and Gould (1870). 



Trophon clathratus, G. O. Sars (1878). 



Fishing banks off Halifax (Willis); Halifax Harbour (J. M. Jones). 

 Between Cape Gaspe and Cap des Rosiers, in 75-80 fathoms, stones ; and 

 north shore of the St. Lawrence, off St. John River and near the west point 

 of Anticosti, in 60 fathoms, sand (Whiteaves) ; Little Metis, Riviere du 

 Loup and Murray Bay, (Sir J. W. Dawson) ; Peter River, St. Anne and 

 Marsouin (Bell) ; bank off Caribou Island (Packard). Chateau Bay, 

 Labrador, 50 fathoms ; and Henley Harbour, 20 fathoms (Packard). 



It is not quiti^ clear to the writer whether the " Tritonium clathratum, 

 Miill.," of Stirapson's Synopsis of the Marine Invertebrata of Grand Manan ; 

 or the Trophon clathrahim, (Linne) Moller," of Miss Bush's list of the mollusca 

 dredged on the coast of Labrador by the Stearns expedition, should be 

 referred bo this or to the preceding species. 



In a fossil state, T. clathratus, as here defined, has been found in Pleisto- 

 cene deposits at Riviere du Loup, Murray Bay, Montreal, and Labrador. 



Trophon clathratus, var Gunneri. 



Tritonium Gunneri, Loven (1846). 

 Murcx [Trophon) Gunneri, Miirch (1867). 

 Tro^jhon Gunneri, H. and A. Adams (1858). 

 Trophon clathratus, var Gunneri, G. O. Sars (1878). 



Bay of Fundy, off Grand Manan (Yerrill); Le Have Bank, in 45 and 60 

 fathoms, U.S. Fish Commission, 1872 (Smith and Harger); off Cape Sable, 

 N.S., 59 fathoms, — and mouth of Halifax Harbour, 16 and 18 fathoms, 1877, 

 U.S. Fish Commission SS. Speedwell (Verrill). Gasp^ Pay, living, in about 

 30 fathoms (Whiteaves); Metis (Sir J. W. Dawson). 



Gould's T. scalariforme was based upon specimens in which the thin 

 laminar varices of the shell are almost obliterated. So far as the writer's 

 experience goes, this obliteration of the varices is due to the fact that such 

 specimens are usually found on rough bottoms of loose stones or rock at 

 some distance from land. In T. Gunneri, which is generally found on 

 muddy or sandy bottoms, in sheltered bays, the varices are well developed 

 and beautifully preserved. 



