306 GAMMAHID.E. 



articulated about one-third from the apex, and tipped 

 with a long spine-like hair. The central tail-piece has 

 the inner margin of each division straight, the outer 

 rounded, and furnished at the apex with one or two 

 hairs. 



We have only seen this animal when dead ; but the 

 skin is very thin and transparent, and appears to contain 

 no colouring matter; neither have we been enabled to 

 detect any eye. These circumstances, together with its 

 having been hitherto taken only in muddy and sanely 

 bottoms, suggest the idea that it is a burrower in the 

 mud. Tt was first taken at Wisby, on a sandy bottom, 

 at from eighteen to twenty fathoms of water, by Prof. 

 Lindstrom, who also captured it at Lanskrona. It has 

 been taken by Prof. Williamson, on a fine sandy bottom, 

 off Weymouth ; and Mr. Webster has dredged it near 

 Tenby. 



