176 
HISTORY OP BRITISH CRUSTACEA. 
organ ? This seems to be supported by the fact, that blood- 
discs pass into the hair-like processes on the surface of the 
flabella in the Brachyura ” 
Gen. 73. DARWIN I A, Spence Bate . 
First seven joints after head inflated ; upper antenna not 
before the lower, without secondary appendage. All the 
feet terminating in simple hooks, not subcheliform. 
Named in compliment to Charles Darwin, Esq., author 
of ‘ Researches in Natural History, made during the voyage 
of the Beagle/ of two volumes on the Cirripedes, and many 
other celebrated works. 
Darwinia compressa, Spence Bate. — Head produced 
into a beak; eleventh, twelfth, and thirteenth segments 
slender and weak, lying compressed beneath the body. 
Upper antenna stouter and longer than lower. Telson 
single, lanceolate. 
Banff (Mr. Edwards) ; Macduff (Mr. Gregor). 
Gen. 74. IPHIMEDIA, Ratlike* 
Not compressed ; upper antenna without secondary ap- 
* Genus added to our Fauna by Mr. Spence Bate, Ann. and Mag. Nat. 
Hist. 1857. 
