1870.] Contributions to Indian Malacology, No. XL 11 



sub-basali, hand procul a latere columellari silo. Long, exempli 

 spird perfectd 8, diam. 6, ap. long. 4£, lat. 3% mm.; 

 exempli majoris, spird erosd, long. 9 J, diam. 7, ap. long. 6, lat. 5 mm. 

 Hab. ad Torna, haud procul a Poona versus occidentem. 



Var. canaliculatus ; PI- III, fig. 4 ; sutura canaliculala, an- 

 fractibus juxta suturam acute carinatis. Long. 8, diam. 6^-. 



Hab. ad Torna. 



In consequence of the preoccupation of the name Cremnobates for 

 a genus of fishes,* I have in the Ann. and Mag. Natural History, 

 for May, 1869, proposed to substitute Oremnoconchus. The present 

 is a third species of this peculiar form of the Littorinidce, the others 

 being C. Sghadrensis, the type of the genus, and C. carinatus, 

 L a y a r d, originally described as an Anculotus. All these shells have 

 a similar habitat, — precipices or steep hill sides in places where 

 water runs over the rocks during the monsoon. G. Sghadrensis is 

 found on the hills opposite Bombay. I have met with it not only 

 at Khandalla where the first specimens were obtained, but also on 

 Matheran hill and at Egutpoora. C. carinatus has only been found 

 at Mahableshwar. The present form was met with abundantly on 

 the steep slopes of Torna one of the old Deccan hill forts about 35 

 miles west of Poona. The specimens were taken from rocks by 

 the sides of the small torrents running down the hill side. 



The canaliculate variety serves to connect the typical form with 

 carinatus, as many specimens have the angle at the periphery more 

 marked than in the typical conicus ; but specimens of carinatus are 

 of a somewhat different form, with considerably less swollen whorls. 

 Perhaps all three forms should be considered as varieties of one 

 species, for which, however, the name carinatus, which is not very 

 appropriate even for full grown specimens of the Mahableshwar 

 shell, can scarcely be retained with propriety. 



Mr. Layard's original description of the latter shell was taken 

 from a specimen in Mr. Hugh Cuming's cabinet, which, like 

 other Bombay shells in the same collection, was probably originally 

 derived from Mr. F a i r b a n k, to whom also I am indebted for speci- 

 mens, as I did not meet with the shell myself at Mahableshwar. 

 I am inclined to believe that the type described by Mr. L a y a r d 

 * Described by Dr. G ii n t h e r in Proc. Zool. Soc. 1861, p. 374. 



