93 
A more lengthened description of this species, which I shall still 
call T. funiculata, 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 strise 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., 
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. 
Puitorotamis THwaitresu, Layard. 
Shell oblong ovate; axis 13 lines, diam. 9 lines. Spire exserted, 
short. Whorls almost carinated round the upper part, spirally 
