410 MURICID^. 



bal)ly lingers, the iiulividuals few and far between, on 

 tlie boreal outlines of our seas, the relicts of an ancient 

 fauna ; for, though rare in the coralline, it was abundant 

 in the red crag seas. It is now chiefly an inhabitant 

 of the icy seas, and ranges from Greenland to Behring\s 

 Straits. 



B. HuMPHREYSiANUM, Beunctt. 



Faintly variegated, almost smooth, never with folds ; body 

 longer than the spire. 



Plate ex. %. 1. 



Buccimim IJmnpJire^sianum, Benn. Zool. Journ.vol. i. p. 398, pi. ■2"2, top figures. 



— Brit. Marine Conch, p. 215. — Brown, Illust. 



Conch. G. B. p. 4, pi. 4, f. 14.— Bullet. Sciences 



Nat. vol. vii. p. 259. 

 Tritonium „ Middend. Malac. Rossica, pt. 2, p. 1G3 ? 



This rare and elegant Buccimim has an oval-acute figure 

 is more or less thin, a little transparent, and of a pure 

 and delicate creamy flesh or very pale fawn colour, on 

 which are painted, though often obscurely, various wavy 

 markings of brown or fulvous. These which upon the 

 spire are usually arranged lengthways in flexuous streaks, 

 seem disposed upon the body in spiral bands, of which 

 there seem two narrow twin ones, one basal, one infra- 

 medial, besides a broader upper one (perhaps composed of 

 two confluent ones), on which they sometimes form an 

 irreofular kind of network. The surface does not exhibit 

 the slightest trace of riblike undulations, but is most 

 closely encircled with fine sulci (whose intervals are scarcely 

 broader), and crossed lengthways, at least on the prin- 

 cipal turns, by most minute regular close-set lines, that 

 beneath a powerful lens are perceptibly, though very 

 slightly elevated. No substantial angularity or retusion 

 disturbs the simple roundness of the volutions, which are 



