TROPHON. 319 



with T. muricatus (Humphreys) ; Dublin Bay (Kinahan 

 and Walpole); Lough Strangford, 12-15 f. (Dickie); co. 

 Antrim, 8-25 f. (Hyndman and J. G. J.); perhaps also 

 Dunbar (Laskey, as Murex muricatus). "Irish Drift " 

 (Forbes). All the foreign localities are Scandinavian, 

 viz. from Oxford in Finmark (Sars and Danielssen) to 

 Bohuslan (Loven and Malm), at depths of 40-150 f. 



It creeps, like Lachesis, foot upwards, on the sur- 

 face of the water. A capsule, in a valve of Leda minuta 

 (now before me), is very thin, semitransparent, and 

 marked with delicate, close-set, microscopic concentric 

 lines ; orifice oval. Some shells are more elongated 

 than others. The outer point of the old canal is occa- 

 sionally visible, so as to make the base double, or (when 

 neither of the two previous canals has been covered 

 with new shelly matter and incorporated with the base) 

 triple. Specimens from beyond the Dogger bank, in 

 5060 f., are of unusual size, being nine-tenths of an 

 inch in length. 



I consider this species not less distinct from T. muri- 

 catus than the following species from T. clathratus ; 

 they bear the same analogy to each other. 



Tr^tv l^*Kr*fc* a/**"*)] v, tv, c*4*, , 5 fr* 



3- T. TRUNCA'TUS*, Strom. ^-M' 



Buccinum (truncatum), Strom in Norsk. Vid. Selsk. Skr. iv. p. 369, t. xvi. 

 f. 26. T. clathratus, F. & H. (not Murex clathratus, Linn6) iii. p. 436, 

 pi. cxi. f. 1, 2, and (animal) pi. SS. f. 3, as T. Bamffium. 



BODY whitish, pale yellowish-white, or creaincolour, with 

 sometimes a faint tinge of fleshcolour, and thickly covered 

 with milk-white specks : pdllial tube very short, scarcely pro- 

 truded: tentacles awl-shaped, rather short, and diverging, 

 with blunt tips ; that part which surmounts the eye-stalk is 

 slender : eyes small, placed on long and thick stalks which 

 reach about two-thirds up the tentacles, on their outside : 

 foot narrow, double-edged and bilobed or nearly truncated in 



* Cut off. 



