292 I'ROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



DESCRIPTION OF PLECOTREMA SYKESII, n.sp., FROM KARACHI. 

 By J. Cosmo Melvill, M.A., F.L.S., etc. 



Jiead nth June, 1897. 



Plecoteema Sykesii, n.sp. 



P. testa parva, rimata, soliclula, ochraceo-cornea, Ifcvi, anfractibus 

 6 Tcl 7, infra, juxta suturas, transversini binis sulculis superficialiter 

 scalptis, alitor omnino la)vibu8, ultimo anfractu ca)teros late conjimctiin 

 supcrante, apcrtura oblonga, peristomate extus paullum incrassato, 

 intus quinque dcntibas plicisve albidis mimito, videlicet ; duobus 

 dentibus labialibus, tribusque plicis columcUaribus. Long. 4, 

 lat. 1'75 mm. 



^a J.— Karachi (F. W. Townsend). 



A small horny-yellow Plecotrema, of which we have seen a few 

 specimens, all precisely similar. The shell is solid, rimate, six- or 

 sevcn-whorled, with the surface entirely smooth (thus differing from 



Plecotrema Sykesii, n.sp. 



most of its congeners), with the exception of two, very superficial, thin, 

 s])iral sulculi, more like scratches than farrows, just below the sutures. 

 The last Avhorl is much the largest. Mouth oblong, peristome some- 

 what thickened exteriorly, and within provided with two labial teeth 

 and three columellar plaits; both teeth and plaits are whitish. 



I am much indebted to Mr. E. R. Sykes for having assisted me in 

 the discrimination of the species of this genus, and have unus\;;d 

 pleasure in connecting this very interesting little new form witli 

 his name. He desires me to take this opportunity, since no suitable 

 occasion has presented itself to him, to point out that, by an oversight, 

 P. mucronatum, Molldff. (jS^achr. Deutsch, Malak. Gesell., 1894, p. 116), 

 from Bohol, was omitted from his paper on the genus (Proc. Malac. 

 Soc, Vol i, p. 241). 



The other Plecotrema, brought by Mr. Townsond from Karachi, is 

 P. cojicinnum (H. & A. Ad.). 



