Mr. E. L. Layard on new species of Philopotamis. 189 



A more lengthened description of this species, which I shall still 

 call T. funiculatay Reeve, may prove acceptable, and prevent others 

 from experiencing the same difficulty which I have felt. 



Shell oblong ovate; axis 13 lines, diam. 10. Spire exserted. 

 Whorls rather depressed round the upper part, spirally corded with 

 rather distant obtuse ridges placed at unequal distances, sometimes 

 with a thread-like ridge between two larger ones, the whole minutely 

 longitudinally striated. Colour a bright rich yellow, variegated with 

 closely set, dark brown, broadish, zigzag lines. Interior whitish ; 

 exterior lip faintly marked all round with purplish-brown, with fre- 

 quent dark brown spots ; columellar lip white, with the exterior 

 margin stained with a bright pale brown. This description is taken 

 from the original type shell ; in some examples the ridges are almost, 

 if not quite, obsolete ; the spire is hardly exserted, the zigzag lines 

 lost, and the aperture almost pure white ; one of these specimens 

 measures, axis 9^ lines, diam. 8 lines. In another, measuring, axis 

 17 lines, diam. 14 lines, the striae are much coarser, and some of the 

 upper ridges present a decided indication of nodules ! The outer lip is 

 pretty deeply edged with dark brown, and the bright brown of the 

 columellar lip, though still present, is soon changed into a deep rich 

 hue. 



The species is abundant in a mountain stream not far from Ratna- 

 poora, probably the very stream whence my lamented friend Dr. 

 Gardner procured the type specimen, as it is crossed by the high 

 road leading thither from Colombo ; and, as I have had opportunity 

 of witnessing, Dr. Gardner never failed to examine every stream he 

 passed. 



Philopotamis sulcatus. Reeve. 



Operculum ovoid ; apex slightly inclined, sinistral, paucispiral. 

 Nucleus sub-basal, dextral. Mollusk black ; forehead produced, as 

 in Paludomus chilinoides ; tentacles and eyes also the same. 



Hab. Weyweldenia, a rocky rivulet. I found this species loc. cit.y 

 and I then remarked that vast numbers of them were crawling on the 

 wet grass on the banks of the stream. I subsequently found it at 

 Kandangamoa and in the Calloo ganga. 



Philopotamis regalis, Layard. 



Shell oblong ovate ; axis 1 inch, diam. 9 lines. Spire exserted, 

 short. Whorls rounded, depressed at the upper part, spirally corded 

 with close-set slight ridges, longitudinally minutely striated, and 

 crowned with a single row of short, sharp, hollow, angular spines, 

 closely set. Colour yellowish-olive, painted with wavy, dark brown 

 longitudinal lines. Aperture pure white. 

 Operculum unknown, but most probably as in P. sulcatus, 

 Hab. Stream in the Cnia Corle, Western province, Ceylon. 



Philopotamis Thwaitesii, Layard. 



Shell oblong ovate ; axis 13 lines, diam. 9 lines. Spire exserted^ 

 short. Whorls almost carinated round the upper part, spirally 

 corded with unequal-sized, close, but irregularly set ridges, gramdated 



