THE ENTONISCIDiE 407 



The embryo has a nauplian eye, and swims with the sixth 

 pair of trunk-feet extended. 



Grapsion GavoKnii, Giard (1878), on Fachygrapsus ma/r- 

 moratus, Fabricius. This species is named after Cavolini, 

 who in 1792 described an Entoniscid from ' Granchio de- 

 presso,' which is supposed to be the same as Fachygrapsus 

 Tnarmoraius. 



GancHon, Giard and Bonnier, 1886. Parasitic on 

 Cancridee. The female has the marsupiura closed when 

 adult, and has four dorsal ovarian bosses. The sheath in 

 which the animal is enclosed is always covered with thick- 

 enings of yellow chitin. The male has the pleon clearly 

 distinct from the peraeon, elongate, without ventral pro- 

 minences or terminal hooks, the bilobed apex of the sixth 

 segment being minutely squamosa. The embryo has the 

 sixth trunk-feet elongate and carries them extended 

 laterally. 



Gancrion cancrorum (Fritz Muller, 1864), on several 

 Brazilian species of Xantho, implying ex hypothesi several 

 species of parasite under one name. Fritz Muller states 

 that the heart in the male is situated in the third segment 

 of the pleon. 



Garicrion miser, Giard and Bonnier, 1886, on Pilumnits 

 hirtelhis (Linn.) Six specimens were found. The crabs 

 examined were more than 1,800. 



Gancrion floridus, Giard and Bonnier, 1886, on Xantho 

 incisus, Leach, commonly called Xantho florid/us (Montagu). 

 Three specimens were found to about 900 crabs examined. 



Fortunion, Giard and Bonnier, 1886. Parasitic on 

 Portunidas. The female has the marsupLum closed when 

 adult, the ascendant lamella of the first pair of plates 

 regularly widened from the base, much recurved, the 

 upper edge not cut ; there are two medio-ventral and two 

 latero-dorsal ovarian bosses. The male has medio-ventral 

 hooks on the pleon, and the sixth segment apically fur- 

 nished with a pair of hooks. The embryo is without a 

 nauplian eye, and swims with the sixth trunk-feet carried 

 under the pleon. 



Fortunion mcenadis, Giard, 1886, on Garcinus mcenas 



