410 A HISTORY OF liECENT CEUSTACEA 



Athelgm intermedia, Hesse, 1877, on Eujpagurus cuor 

 nensis (Thompson). 



Aihelgue Gmrdonce, Kossmann, on GUhanarius misaiv- 

 thropus, Risso. 



Athelgue lorlfera, Hesse, 1877, on Eupagurus cuanevsis 

 (Thompson), together with several specimens of Pdto- 

 gaster. 



Aihelgue cladophora, Hesse, 1861. 



I'leurocrypia, Hesse, 1865 The male has the pleon as 

 in Phryxus. In the female, it is stated, ' the five segments 

 of the pleon are provided each, on each side, near the 

 margin, with a branchia of oval form, filiform, thin, flat, 

 very contractile.' The sixth segment has two small ap- 

 pendages. 



Pleurocrypta galatece, Hesse, 1865, on Galaihea squami- 

 fera, Leach. According to Giard and Bonnier the Phryxus 

 longibranchiatus of Bate and Westwood is the Phryxus 

 stage of this Pleurocrypta. 



Pleurocrypta porcelianoe, Hesse, 1877, on Porcellana 

 longicornis (Linn.). 



Pleurocfi-ypta strigosa, Giard and Bonnier, 1890, on 

 Galathea strigosa, Fabricius. 



Pleurocrypta Hendersonii, Giard and Bonnier, 1890, on 

 Galathea dispersa, Bate, from the Clyde. 



Palcegyge, Giard and Bonnier, 1888. The male has 

 the pleon composed of well-separated segments, each on the 

 ventral side carrying rudiments of pleopods. The authors 

 in 1890 suggest that it will probably be necessary to 

 make two sections of the genus, one characterised by the 

 plates of the pleon in the female being furnished with 

 warts or tubercles, and including the species parasitic on 

 Anomala and Thalassinida, the other characterised by the 

 appendages of the pleon being entirely smooth, and in- 

 cluding the species parasitic on the Piikyphota (see page 

 224). For the former division the genus Pseudione, Koss- 

 mann, seems to be the appropriate name, and for the latter 

 Palcegyge. As the name implies, this genus is regarded 

 by its authors as representing an ancestral form of Gyge. 



