HYAS. 



23 



widened in front, and then distinctly contracted or notched 

 behind the outer orbilal angles. 



A small species widely distributed. Mr. Barlee found it 

 in Shetland ; and it occurs in most parts of the coasts of 

 England, Ireland, and Scotland. The Rev. Alfred Norman 

 has supplied me with the following note : — " Abundant, and 

 very fine off the Isles of Arran and Cumbrae in the Firth 

 of Clyde, and at Oban. It inhabits the coralline zone. 

 This species varies very greatly in size in different localities. 

 The following is a comparison of specimens taken at Sand- 

 gate, as given by Mr. Bell and others, from the Moray 

 Firth, given me by Mr. Gordon, with these from Cumbrae 



I have likewise taken it at Falmouth. Mr. Pi. Couch in- 

 forms me that it is not common on the Cornish coast, and 

 that the specimens are always of small size there." 



