1>G7.] Contributions to Indian Malacology. 65 



find no description of this species, and cannot therefore say if it be the 



present form or not. 



No. 26, Plecotrema Cumingiana, n. sp. PI. II. fig. 16. 



Testa subrimata, subellipttco-ocata, solida, punctis impressis crebris, 

 lineas spiralis confertas f unnantibus, striisque incrementi obliquis ornata, 

 ferrugineo-fusca, Spira conoidca, lateribus vix convexiuscidis, apice 

 erosa, sutura Icaoi lineari. Anfr. 4 superst., superi planulati, vix 

 discreti, side is spiral ibus punctatis 4 notati, idtimus ad peripheriam sub- 

 angulatus, subtus compressiusculus. Apertura vix obliqua, plicis parie- 

 talibus 2, superiori brevi obliqua, altera intrante, extus bifida, plied 

 columellari subobliqud ; peristoma rectum, pone limbum acutum intus 

 callosum, margine dextro tridentato. 



Long. 5, diam. 3 mill. Apert. 3 J mill, longa. 



Shell subrimate, subelliptically ovate, solid, marked with close spiral 

 lines, formed of thickly set punetiform impressions, and with oblique 

 stri;e of growth ; reddish brown in colour. Spire conoidal, the sides 

 barely convex, apex eroded, suture Hat. Whorls 4 remaining, the 

 upper Hat, scarcely distinguishable, marked with 4 spiral dotted lines, 

 the last whorl subangulate at the periphery, somewhat compressed 

 below. Aperture very slightly oblique, with two parietal folds, the 

 upper short, oblique, the lower re-entering, externally bifid, the colu- 

 mellar fold sub-oblique ; peristome straight, margin sharp, but inside the 

 sharp edge thickened and bearing 3 teeth within the right margin. 



This species was rather scarce, crawling on mud in company with 

 Assinunea rubella. It is distinguished from its allies, P. striata, Phi- 

 lippi, and P. punctostriata, II. and A. Adams, by its low spire and 

 minute sculpture. In naming it after the late Mr. Hugh Cuming, 

 I adopt the only means in my power of acknowledging my obligations 

 to that gentleman for the very liberal manner in which he allowed 

 me access to his collections, for the purpose of comparing and identi- 

 fying my Pegu shells. 



Besides the above Auviculidm, I have received a Pytliia which ap- 

 pears to be a variety of P. trigona, Troschel, from Mr. Theobald and 

 Mr. Fedden, who both met with it on the Arakan coast, not far north 

 of Cape Negrais. It is singular that I did not meet with species of 

 either Cassidula or Melampus, as I have reason to believe that both 

 inhabit the Irawadi delta or its immediate vicinity. Mr. Theobald 

 has sent me Cassidula aurisfelis, Brug. from Arakan. 



9 



