MOEE LIGHT IN THE FUTUKE 417 



back to chapter xvii., page 235. Bopyrbia virbii, corre- 

 sponding with the fignre of the young female given by 

 Kossmann in the ' Zeitschrift fiir Wiss. ZooL' Bd. 35, pi. 34, 

 fig. 6, 1881, has been found lying across the hind dorsal 

 margin of the carapace of Hipprjliite varians taken at Ilfra- 

 combe. From the conical mouth-apparatus protrude a pair 

 of denticulate lancets, the points of the mandibles. 



Bopyroides, Stimpson, 1864. Formed for those species 

 that agree in shape and structure with Bopyriis, but differ 

 in their branchial features in having merely fleshy ridges 

 instead of lamina3, with the segments of the pleon distinct. 

 See ' History of British Sessile-eved Crustacea,' vol. ii. p. 

 223. 



Bopyroides acutimarginatus, Stimpson, 1864, on Hip- 

 polyte brevirostris. Stimpson also thinks that Bopyrus 

 hippolytes^ Kroyer, should be placed in this genus. By 

 Bate and Westwood that is called Gyge liippolyies (Kroyer). 

 Kroyer's species was taken on Hippo! yte polaris. The 

 host of the British form is not named. 



Hemiarthms^ Giard and Bonnier, 1887. The authors 

 say, 'It is impossible to leave in the genus Pliryxus the 

 parasites of the abdomen of Virhius and Hipjpjolyte. These 

 animals differ much from the Phryxus type, alike in the 

 female and in the male, w4iich has all the pleon-segments 

 free and furnished with rudimentary limbs. We have 

 established for these Bopyrians the genus Hemiartliriis' 

 In the promised continuation of their great work on the 

 Bopyridee, no doubt the obscure relations between this and 

 some of the preceding genera will be illuminated. 



Hemiarthrus typtonis, Giard and Bonnier, 1890, on 

 Typton spongicola^ Costa. 



Hemimihrus philoniha, Giard and Bonnier, 1890, on 

 Nilca edillis, Risso. 



Hemiarthrus virbii^ Giard and Bonnier, 1890, on ' Fm'- 

 bius ' viridis, Otto. 



Hemiarthrus Granchii, Giard and Bonnier, 1890, on Hip- 

 polyte Granchii^ Leach (?). This and the preceding species 

 answer to what Walz has called PJtryxus abduminalisj 

 Kroyer. 



