some new and peculiar Mollusca. 325 



also B. horeale of Broderip and Sowerbj, from Kamtschatka. 

 My largest specimen is more than 2| inches long. 



Muricidaj. 

 Trophon clathratuSj Linne. 

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



Body pale yellowish-white : tentacles slender, but rather 

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

 as long as the tentacles and are united with them : 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 fnis. ; Station 4, 

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

 Expedition, 1869, off the Hebrides, 165-580 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. ; 

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

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

 and Scandinavian coasts, and Iceland. Buccimcm {truncatnm)^ 

 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 Linn^ 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 tlie whorls, and the 

 size. My largest specimen of the typical form measures an 

 inch and a quarter in length. 



The synonyms are inconveniently numerous, viz. Murex 

 havrffius^ Donovan; M. peruvianus^ J. Sowerby ; M. multi- 

 costatus, Escholtz ; Fusus lamellosus, Gray ; F. scalai'iformis^ 

 Gould ; Tritonium Gunneri (a variety), Lovdn ; and Murex 

 lamellatuSj Philippi. Morch cites also Tritonium Rossii^ 

 Leach ; but I cannot verify the reference. 



Trophon Fahriciiy Beck. 

 Trophon Fahricii (Beck), MoUer, Ind. Moll. Groenl. p. 14. 

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

 Ann. & Mag. N. Hist. Ser. 4. Vol. xix. 23 



