POCKETED PARASITES 4.05 
LTeponiscus, Giard, has the single species Leponiscus 
pollicipedis, parasitic, as the name indicates, on a pedun- 
culate Cirripede. 
Family 6. --Entoniscide. 
The animals are parasitic (to appearance) within the 
bodies of Brachyura, entering through the branchial into 
the visceral cavity. In the females the body is extremely 
unsymmetrical, with traces of segmentation when young ; 
the head is swollen into a double sphere, the antenne are 
metamorphosed into lips; the Jabrum, hypostome and 
mandibles forming the oral apparatus. The maxillipeds 
are lamellar, the feet rudimentary, the marsupium formed 
of five pairs of plates, with the first pair situated be- 
tween the rest; the ovaries opening at the base of the 
fifth pair of feet, and by their prolongations determining 
the shape of the peraeon ; the pleon has six segments, fur- 
nished with lamellar or sabre-shaped pleopods. In the 
minute male there are two rudimentary eyes, the antennz 
are evanescent, the maxillipeds are rudimentary, the 
seventh segment of the perzeon is without appendages ; 
the six segments of the pleon are without pleopods. ‘The 
embryo has two eyes, sometimes a nauplian eye, the 
second antenne elongate, six pairs of feet, five pairs of 
pleopods and even a pair of uropods. In the ‘Crypto- 
niscian stage’ there are seven pairs of feet. MM. Giard 
and Bonnier give a provisional genealogical tree of the 
Entoniscidz in connection with their hosts. 
Portunion (Portunus) 
Entione (Ach@us) 
Cancrion (Cancer) 
ks 
Grapsion (G@rapsus) 
Entoniscus ( Poreellana) 
