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. 
