206 CYCLOSTOMID^. 



Its shape is elongated, the head proboscideforrn, the ten- 

 tacles long and subulate. The eyes are placed directly 

 behind the tentacles, from which they are sejmrated by a 

 series of specks arranged semicircularly. 



This little mollusk is a rare species, not found in Scot- 

 land, and local in England and Ireland ; on the whole, 

 southern and western in its distribution. Penzance 

 (Cocks); Devon, Bristol (Turton) ; Pembrokeshire (Jeff- 

 reys) ; Helmsley, Yorkshire (Hincks) ; Northumberland, 

 rare (Alder). Widely distributed, but rare, in Ireland. 

 Clare, on sand hills (Harvey) ; Down, Antrim, Dublin, 

 &c. (Thompson). 



A reversed variety among the rejectamenta of the Avon 

 (Jeffreys). 



