3o6 



DESCRIPTIONS OF THREE NEW SPECIES OF 



MARGINELLA FROM SOUTH AFRICA, 



WITH A NOTE ON M. SUTORIS Dunker. 



By J. R. LE B. TOMLIN, M.A. 



(Read before the Society, Julj- 17th, 1918). 



Plate X. 



Marginella aphanacme sp. nov. (Plate X., fig. 4). 



Shell closely allied to my M. aphatiospira (^/ojirji. of Conch., xiv., 

 p. 10 1), but much narrower in breadth, and with a narrower aperture ; 

 the columella is more gradually curved towards the base, and carries 

 seven plaits instead of only two, all except the lowest one being 

 small and weak (in the figure nos. 2 to 6 are rather too prominent) ; 

 labrum slightly thickened and rising above the apex of the whorls 

 anteriorly. 



Alt., 2 '5 mm. ; diam. max., i'5 mm. 



Hab., Port Alfred (Turton). 



Type, in coll. Turton. 



Marginella Uthychila sp. nov. (Plate X., fig. 5). 



Shell small, cylindrical, smooth, white; whorls 5-^^, spire moderate, 

 rather depressed ; columella almost straight with numerous plaits, 

 of which the two basal ones are much stronger than the rest ; outer 

 lip slightly thickened, very straight and practically parallel to the 

 columella ; denticulate and lirate within, the number of denticles 

 being about fifteen ; aperture narrow throughout and but slightly 

 widened below ; sutures very little marked. 



Alt., 2"5 mm.; diam. max., i"25 mm. 



Hab., Pt. Alfred. 



Type in coll. Turton. 



The figure does not show the denticulation of the lip owing to the 

 slight folding over of the edge. The number of columellar plaits is 

 about six, but it is impossible to determine the exact number in the 

 type owing to a small stone wedged in the aperture. 



Marginella -atractus sp. nov. (Plate X., fig. 6). 



Shell closely related to M. zeyheri Krauss, but longer and narrower 

 with a narrower aperture ; the number of whorls is the same, but 

 the spire of M. atractus is much more produced. 



1 6^VS, Straight, and i^etXo5, lip. 



2 aTpaKTO?, a spindle. 



