Mollusca of the Arabian Sea, &c. 93 



anfractus costulis longitudinalibus circa duo et quadraginta, 

 spiralibus octodecim ; apertura rotunda ; peristomate fere con- 

 tinue, paullum inerassato, albescente. 

 Long. 4-50, lat. 2 mm. 



Hah. Karachi. 



A small but highly chased Constanti'a, of about the saiie 

 dimensions asjucunda, Adams, from Corea, but with rounder 

 peristome, eight instead of six whorls, and with last whorl 

 more ventricose and not produced basallj. The colour is 

 fuscous; the three apical whorls are almost smooth, shining, 

 vitreous, the remaining five all ventricose, impressed at the 

 sutures, and very closely decussate, with many small longi- 

 tudinal riblets, crossed spirally by others of the same nature 

 and consistency, leaving minute quadrate interstices between 

 them at the point of junction. The peristome is almost 

 continuous, whitish, slightly incrassate, aperture round. 

 Several examples, some of which (which have come to hand 

 since the original description was framed) are lighter in colour 

 but otherwise identical. 



I do not consider Constantia more than subgeneric. 

 I have much pleasure in associating this little shell with 

 the name of Mr. Robert Standen, Assistant Curator of the 

 Manchester Museum, who is about to collaborate with me in 

 drawing up a complete catalogue of Mr. Townsend's large 

 collections of Mollusca from the Indian Ocean. 



ActcEopyramis Psyche, sp. n. (PL I. fig. 13.) 



A. testa attenuato-fusiformi, perlonga, tenui, subpellucida, albido- 

 straminea ; anfractibus decem, apud suturas gradatulis, apicali 

 heterostropho, laevi, globulari, cseteris arete sulcatis, sulcis pulchre 

 punctulatis, ultimo anfractu fere recto, attenuato ; apertura 

 anguste ovata, labro tenui, margine columellari obscurissime 

 uniplicato. 



Long. 16-50, lat. 3-50 mm. 



Hah. Karachi. 



A most delicate semitranslucent shell, to which the specific 

 name chosen seems very fitting. It is akin doubtless 

 to A. fuhttj better, perhaps, known as Monoptygma fulva, 

 A. Ad. ; but this name of Gray's (1840) must become a 

 synonymn, as Lea had previously used it in 1835 for a sub- 

 genus of AnciJla, Lam. From this, however, it differs in 

 several salient particulars — firstly, in the paler attenuation 

 and straightness of whorl ; secondly, in possessing two 

 more whorls; thirdly, in the last whorl not being the least 

 shouldered at the periphery; fourthly, in the whitish and 



