412 A HISTORY OF RECENT CRUSTACEA 
the same as Pleurocrypta galathee, Hesse, from which, 
however, it is distinguished by the clearly segmented 
pleon and rudimentary pleopods. 
Gyge, Cornalia and Panceri, 1861. The lateral pro- 
longations of the pleon are simple, unless transiently 
double in the young female. 
Gyge galathee, Bate and Westwood, 1867, on Galathea 
squamifera, Leach, from the Channel Islands. 
Gyge branchialis, Cornalia and Panceri, 1861, on 
Upogebia stellata (Montagu). In the branchial cavity of 
the host the parasite here as in other instances has its back 
turned to the host’s body, the ventral side with the mar- 
supial plates turned outwards. When the brood is far 
developed, it causes a bulging of the host’s carapace, by 
which the whole parasitic family is securely retained. At 
other times, as Dr. Fraisse observes, the sharp claws, which 
would be unable to grasp the smooth carapace, curve back 
to clutch the branchie. 
Kepon, Duvernoy, 1840. The female has the feet 
ending in an inflated joint, without claw. The adhe- 
sive processes (supposed in general ‘to represent the exo- 
pods) are well developed, papillose, in the first four pairs, 
rudimentary on the other three. The appendages of the 
pleon are coarsely pinnate. 
Kepon typus, Duvernoy, 1840, on an unknown crab in 
the Mauritius. 
Teidya, Cornalia and Panceri, 1861. The female has 
the feet ending in a blunt claw, the adhesive processes 
of all seven pairs nearly equal. ‘The appendages of 
the pleon form sharp finely-fringed branches. ‘The male 
has the first antenne three-jointed, the second seven- 
jointed, the pleon segmented, carrying five rudimentary 
pleopods and two long appendages on the sixth segment. 
Leidya distorta (Leidy, 1855), in Gelasimus pugilator, 
Bose. 
Grapsicépon, Giard and Bonnier, 1887. The female 
has the feet ending in a short sharp claw, the adhesive 
processes oval, not warty. The pleon appendages of the 
Rates. | | 
