SOWERBY : MARINE SHELLS OP SOUTll AFRICA. I49 



Pleurotoma piatystoma Smith. A small species nearly 

 allied to P. Metcalfei and P. Coxi of Angas. 



P. Gray! Reeve. A small species allied to P. castmiea, but 

 shorter and broader. There are several specimens labelled 

 " Cape of Good Hope " in the collection of Dr. Gray in 

 the British Museum. Beside these I have only seen a 

 single specimen. 



Euthria Ponsonbyi Sow. n. sp. (PI. iii, fig. 3). 



P. testa fiisiformis, lutea, aiirantio strigata, solidiiiscula ; anfrac- 

 tus 7, pri7ni 4, spiraliter sulcati, seqiientes Icevigati, angulatt, 

 ad angulum serie tubercidorum coronati, supra angulum 

 concavi ; anfr. ultimiis pyriformis^ infra angulum convexus, 

 spiraliter subohsolete sulcatus, in caztdani brevem leviter 

 recurvam desineus. Aperiura ovata, utrittque angulata ; 

 columella superne arcuata, deinde recurva; labrum arcuatum, 

 ijttus albidum, subobsolete lirattim. 



Long. 40 mill.; maj. diam. 20 mill., apert. ly mill, longa, 

 8 mill. lata. 



Allied to the Mediterranean P. cornea., but having 

 compared it with a large number of specimens and various 

 forms of that species, I am convinced that it is distinct. 

 The tuberculated angle is much further removed from the 

 suture, and the broad space between the angle and the 

 suture more decidedly concave. 



Pseudoliva ancilla Hanley. (PI. iii, fig. 2). Proc. Zool. Soc, 

 1859, p. 429. A very remarkable form, the true generic 

 position of which is doubtful, having characters in common 

 with Pseudoliva and Ancillaria. The specimen shewn me 

 by Mr. Ponsonby is 51 millimetres (just over two inches) 

 long, and 24 millim. wide in the middle, tapering at each 

 end ; of a light reddish-brown colour, with a paler central 

 zone. There was a specimen in the collection of the late 

 Thos. Lombe Taylor, which was acquired by Mr. Melvill, 

 who proposed to give it the sub-generic name of Mariana. 



