6 SOWERBY : MARINE SHELLS OF SOUTH AFRICA. 



P. rousi Sowerby, nov. sp. — Testa oblonga, albida, atro-fusco 

 grandimaculata, lineis fuscis transversis et hie illic longi- 

 tudinalihus retiadata ; spira viediocriter data, apice ? 

 (decollaio) ; anfractus superne leviter concavi, delude coti- 

 vexi, longitudinaliter costati ; costis conspicuis, rotimdatis, 

 superne angulatis, basin versus evanidis ; apertura latiuscula, 

 sinic latiuscula superne emarginata canali brevissimo. Lojig. 

 20, lat. 8 mill. 



Shell oblong, whitish, with large dark-brown blotches, 

 and reticulated with transverse and here and there longi- 

 tudinal brown lines; spire moderately elevated, apex? 

 (decollated) ; whorls concave above, then convex, longi- 

 tudinally ribbed; ribs conspicuous, rounded, angled above, 

 fading away towards the base ; aperture rather wide, with 

 rather a wide sinus at the upper part, and a very short 

 canal. 



Specimens in poor condition. 



P. bairstowi Sowerby, nov. sp. — Testa fuslforinls, atro fusca ; 

 anfr. 7, convexlusculi, costis brevibus albidis (in anfr. ult. 

 circ. 12) ornati ; apertura elongata, mediocriter lata, sinu 

 latiusculo viarginata ; canali brevissimo. Long. 14, may. 

 lat. J' mill. 



Shell fusiform, very dark brown ; whorls 7, ornamented 

 with short whitish ribs (about 12 on the last whorl) ; aper- 

 ture elongated, moderately wide with a rather broad sinus 

 at the upper part, and a very short canal 



Melapmm bulbus Wood. — This species is distinct from the 

 M. liueatum, with which it has been confounded. The 

 shells, which are longitudinally streaked with numerous 

 brown lines, are scarcely ever more than ij^ inches in 

 length. Af. lineatum is a species of very rare occurrence 

 and probably inhabits a different part of the world. The 

 specimen of it in the British Museum is nearly 2^ inches 



J.C, v., January, 1886. 



