258 PROCEEDINGS OF TOE M.\X.VCOLOGICAL SOCIETY. 



fresli water, Culvert, with Velorifa.'''' It seems to me quite possible 

 that " Peihoi," which is very different from " Peilio River," as 

 rendered by Adiims, may be some small villap;e on the Malabar coast. 

 Whether this be so or not, there is no dunbt that this species really 

 does occur at Cochin, for in the collection of the late Dr. Francis Day, 

 bequeathed to the British Museum, there were four specimens from 

 that locality. Jud<i,inp: from those four examples, this species, like 

 other estuarine forms, appears to be very variable as regards both size 

 and shape. The largest specimen (12 mm. in length) somewhat 

 exceeds the dimensions given by Adams, whereas the smallest, although 

 adult, is only 7 mm. long. The proportionate stoutness and the 

 height of the spire also vary considerably. 



