MoLUTSCA, I. SMITH. c,:; 



above, sculptured also with line arcuate lint's of growth, which are coarser towards 

 the suture, giving a somewhal cancellated appearance to the shell at this part -, thev 

 cross the four or five spirals In-low tin- narrowly channeled siilun-. producing minute 

 sharp points or nodules upon them: whorls 5g, the nucleus globose, white, smooth. 

 porcellanous ; the next whorl with four spirals; the third with seven, not all equal 

 in thickness ; the penultimate with eleven ; and the last having about fourteen above 

 the periphery and aliotit twenty-five In-low: the umbilical area is smooth, dirty white: 

 peristome thin, subeircular, interrupted mi its juuctiou witli the wliorl. the columellar 

 margin slightly thickened, expanded upon the whorl and very narrowly retlexed ; 

 aperture iridescent and finely sulcate. the grooves corresponding to the external lirae. 

 Greater diameter 22. smaller diameter 19, height 18 mm. 



Station 194, off Gates Land. 1HO-200 fathoms. 



Only a single specimen of this beautiful shell was obtained. M. charopus, 

 Watson,* from Kerguelen Island, is an allied form, but differs in colour and details of 

 sculpture. 



3. Miti-i/iir/fi'x iliilfis (Smith). 



Vahutclla ilulrix. Smith, " J>isr.>vi-ry '' Gastropoda, p. 10, pi. II, fig. S (1907). 

 lT,ir<j,irlt,-s <lnl,-;.t: Thiele, Deutsrhr Sii.lpolar-Expt.-cl., vol. XIII, p. I'.M). pi. XI. tig. 21. 



Stations 31G. :!:',! : lt)0-2;>0 fathoms. 



The figure of this species in Thiele's work is much better than that in the 

 "Discovery" Eeport. The characters distinguishing this form seem to be fairly 

 constant, but one specimen from Station :>31 has the uppermost lira rather nearer 

 the suture than usual. 



4. Murt/iiritt'x crebrilirulata (Smith). 



Vnh-titi-'llii <-i-<-linlii-nlitt(i. Smith, " Discovery" Gastropoda, p. 11. pi. II, tig. 9 (1907). 

 fiitliiiuiri/aritii .' ci-ilr/lii -iiliitu : Thlrlr, Deutsche Sudpolar-Kxpeil., vol. XI 11, p. L'TiS. 



Station 331 : 250 fathoms. 



The angle upon the body-whorl above the periphery is more apparent in the two 

 specimens in the present collection than is indicated in the figure in the "Discovery'' 

 Eeport. 



5. Margarites, sp. 



Station 11)4 : 180-200 fathoms. 



A single dead shell with a broken spire from the above station differs from all tin- 

 known Antarctic forms. It would probably consist of about live convex whorls. 

 increasing rather rapidly. The last is suborbicular, rounded at the periphery, ami 

 ornamented with numerous spiral threads of unequal thickness. Altogether there are 

 twenty-seven, of which about nine are finer than the rest, and in places they are 



* "Challenger" < !usUTopo<l:i, p. 78, pi. V. ligs. ii i',r.. 



