30 Journal of the Asiatic Society of Bengal. [N.S., XVI, 
minute and delicate. The approximate dental formula is 
7. 11. 1. 11. 7, the laterals being more numerous than in C. 
hiraset. 
The jaw closely resembles that of C. hirasei as figured by 
Clapp in Walker’s paper 
Our specimens are preserved in spirit but appear to have 
been completely desiccated at some period. It is impossible 
to make out much of their anatomy, but we have succeeded 
in srnechtans the penis-sheath, which is elongate as in Planorbis 
and its allies. The tissues are badly preserved and it is impos- 
sible to see details of the structure, but there is certainly no 
penial stylet. 
The external erected is evidently closely similar to that 
of C. terebra and C. hiras 
Measurements of Shells (in millimetres). 
I II 
Ill 
heat ae sk 53 52 55 
Diam os 2°5 2°5 2°6 
Length ‘of Mouth . “ 34 3°6 3°6 
Diameter of Mouth ‘ 77 Ma 1°9 
Type-specimen. No. M 1187+ in the collection of the Zoo- 
logical Survey of India (J ndian Museum). 
Habit he series we have examined was collected by 
Prof. F. Hallberg of St. Xavier’s College, Bombay, on the road 
between Khanabal and Islamabad in Kashmir (alt. between 
4,000 and 5,000 ft.) on April 15th, 1916. A young specimen 
was also found y the same collector in the Chenar Bagh at Sri- 
nagar (alt. 5,250 ft.) on March 23rd of the same year 
The adults were found in a small, very shallow ‘pool, ap- 
parently Rene dug, aivhote. vegetation and with an area of 
only about 12 square yards. They were attached to the lower 
surface of small submerged stones. The young individual was 
n the under surface of a dead plane-leaf in a small canal. 
TAXONOMIC POSITION OF THE GENUS CAMPTOCERAS. 
We are now in a better position to estimate the taxono- 
mic status of Camptoceras correctly than we were when writing 
r former note. We accept Walker’ s view that the genus 
beloune to the Planorbidae, not to the Ancylidae as we for- 
merly thought. The structure of the jaw and of the form of 
the penial sheath affords strong evidence in favour of this 
view a 
The shell-form of our new species, moreover, is less different 
from that of Bullinus, Adanson, than that of any species of 
Camptoceras previously described. As we have pions pointed 
out, this species closely resembles C. lineatum. In describing 
the latter the late Dr. Blanford expressed a doubt as to its 
