28 ZOOLOGICAL COLLECTIONS MADE DURING [Jan. 4, 



Lachesis meridionalis, sp. n. (Plate IV. fig. 3.) 



Shell small, whitish, cancellated, turreted. Whorls 6 ; two apical 

 very large, smooth, convex ; the rest also convex, longitudinally 

 ribbed and transversely lirate. Costae subequal to the interstices, 

 about thirteen on a whorl, finer at the upper end than beneath, 

 where they become almost obsolete. Spiral lirse four in number — 

 one around the lower part of the whorls, bordering the narrow deep 

 suture, and scarcely at all affected by the longitudinal costae ; the 

 three others, of which the two lower are much the more conspicuous 

 and coarsely tuberculous upon the ribs, are situated upon the convex 

 portion of the volutions. Last whorl considerably contracted below 

 the middle, encircled by nine transverse ridges, whereof the four 

 upper correspond to those upon the other whorls, the five lower 

 being simple, non-tuberculous, and finer. Aperture small. Colu- 

 mella obliquely arcuate, roundly subtruncate at the base. Canal 

 short, obhque, feebly recurved. Length 4^ millims., diam. Ig, 

 aperture 1 5 long. 



Hab. Boija Bay, Straits of Magellan, 20 fathoms, on a bottom 

 composed of dead shells and stones. 



This species is remarkable for the large smooth nuclear whorls, 

 the convexity and coarse cancellation of those which follow, its 

 narrow form, and the small size of the aperture ; the increase in 

 the width of the volutions is very gradual. 



Trophon geversianus, Pallas. 



Hab. Stations 6 and 7 ■ 



One specimen from Elizabeth Island is very interesting, as showing 

 the great variation to which this species is subject. It is nearly 

 smooth, displaying no indication of cancellation, and exhibiting only 

 faint transverse grooving. 



Trophon laciniatus, Martyn. 



Hab. Stations 1, 2, 7 ; also Cockle Cove, 2-32 fathoms. 



Trophon crispus, Couthouy. 



Hab. Station 7 and Puerto Bueno, 2-7 fathoms, rocky bottom. 



Trophon muriciformis, King. 



Hab. Stations 2, 3, and 7 ; also Puerto Bueno, 2-7 fathoms, 

 bottom rocky. 



This species has been described under the names Fusus liratus, 

 Couthouy, F. corrugatus. Reeve, and F. albidus, Philippi ; all of 

 these, however, are subsequent to King's description in the ' Zoolo- 

 gical Journal' for 1830. 



Trophon fimbriatus, Hupe. (Plate IV. fig. 4.) 



Fusus fimbriatus, Hupe, Gay's Hist, de Chile, vol. viii. p. 165, 



Atlas, pi. 4. figs. 7-7 b. 



Shell fusiform, white. "Whorls probably about 8, obliquely 

 sloping above, and rounded somewhat at the lower part, longitu- 



