some tifw and peculiur }foUuiica. 325 



also B. horeah' of Broderip and Sowcrby, from Kanitschatka. 

 My largest specimen is more than 2J inches long. 



Muricidae. 



Trophon dathratusj Linne. 

 Murex clathratm, Linn. Syst. Nat ed. 12, p. 1223. 



Body pale yellowish-white : tentacles slender, but rathex 

 short : eyes small, placed at the top of stalks which are nearly 

 as long as the tentacles and are united with thi-m : foot large, 

 squarish and double-edged in front, with angular corners, 

 rounded or bluntly pointed behind : siphon consisting of a 

 short and tubular fold. Shy. 



Godhavn, 5-20 fms. ; Waigat Strait, 15-25 fms. ; Station 4, 

 20 fms. ; 5, 57 fms. ; liolsteinborg, 12-35 fms, ' Porcupine ' 

 Expedition, 1869, off the Hebrides, lG.j-580 fms. North 

 Polar seas, Spitzbergen, Iceland, Norway, White Sea, N.E. 

 and N.W. coasts of America, at depths of from 20 to 120 fms. 

 North Japan, 3-48 fms. (v. Schrenck, St. John). 



Var. truncata. Godhavn, shore ; St. 4, 20 fms. ; 5, 57 fms. ; 

 liolsteinborg, 12-35 fms. 'Lightning' Expedition, 189 and 

 530 fms. 'Porcupine' Expedition, 1869, 85 fms. British 

 and Scandinavian coasts, and Iceland. Buccinum {truyicatinn)^ 

 Strom. 



The typical species and variety are common fossils in our 

 newer Crag and in all the post-Tertiary beds of northern 

 Europe : the former is especially characteristic of glacial con- 

 ditions ; and the latter has been noticed by Seguenza as oc- 

 curring in the older Pliocene at Messina. T. clathratus was 

 first noticed and figured by Linne in his ' Wastgota-Reise ' 

 (1747), from Uddevalla. 



I am now convinced that Loven was right in uniting T. 

 clathratus and T. truncatus, although the latter is a very dis- 

 tinct variety. The difference consists in the comparative 

 number of ribs, thickness, convexity of tiic whorls, and the 

 size. ]\Iy largest specimen of the typical form measures an 

 inch and a quarter m length. 



The synonyms are inconveniently numerous, viz. Murex 

 baviffiusy Donovan ; M. peruvianus, J. Sowerby ; M. mulfi- 

 costatuSy Escholtz ; Fusus l-ameUosuSj Gray; F. scalarifurmisy 

 Gould ; Tritonium Guuneri (a variety), Loven ; and Murex 

 laviellatuSj Philippi. Miircli cites also Tritonium Bosstij 

 Leach ; but I cannot verify the reference. 



Trophon Fahricii, Beck. 

 Trophmi Fabricii (Beck), Mulh'f, Ind. Moll. Gnrnl. p. 14, 

 Godhavn, 80 fms.; Station 1, 175 fms. ; 5, 57 fms. ; 12, 

 Ann. d" Matjf. N. Hist. Ser. 4. Vol. xix. 23 



