SYNAMPHITHOE. 201 



posed of pieces of seaweed, and lined internally with a thin, 

 smooth, and glutinous membrane. This furrow is attached 

 to the under side of stones, or is imbedded in some entangled 

 seaweed. A male and female reside in each. Dr. Johnston 

 adds that he has seen them, when expelled from it, repeatedly 

 return and re-enter it. 



Amphithoe obtusata. Leach's Coast Screw. — Of a pale 

 brown, usually mottled with rufous brown, especially about 

 the legs ; arms four, the front pair very small, the others 

 furnished with large hands, the claw a little hooked, always 

 blunt at the end. Length three-eighths of an inch. 



Salcomb Bay. 



Amphithoe dubia. — Horny colour, with a few red lines 

 on back. Hands equal, oblong, not much dilated, and spa- 

 ringly ciliated. 



Near Berwick, amongst Conferva, in pools left by the 

 tide (Dr. Johnston). 



Gen. 98. SYNAMPHITHOE, Spence Bate. 



Second jaw-foot larger than the first ; posterior false feet 

 with one branch squamiform, the other ending in two hooks. 

 Telson terminating in a single strong hook. 



