AN OLD NAME REJECTED 415 



Argeia, Dana, 1852. In the female the side-plates of 

 the segments are developed into long lobes, but without 

 adhesive processes. The pleopods are short, not ramified. 

 In the male the pi eon is unsegmented, and without ap- 

 pendages. 



Argeia pugettensis, Dana, 1852, in Crangon munitus. 



Argeia depauperata, Stimpsoii, 1857, in Crangon Fran- 

 ciscorum, from San Francisco Bay. 



Bopyrus, Latreille, 1804. In the female the bound- 

 aries of the pleon-segments are not visible in the centre of 

 the back ; the pleopods are pairs of simple rudimentary 

 plates. In the male the pleon has no lateral appendages. 

 Leach, in the Appendix to his ' Crustaceology,' 1814, makes 

 the strange remark that ' the genus Bopyrus is to be 

 altogether rejected from this article, as it belongs to the 

 class Vermes.' 



Giard and Bonnier give up the old name Bopyrus squil- 

 larum, Latreille, 1804, on the ground of the inextricable 

 confusion of the synonymy, Latreille's squillarum having 

 been indiscriminately applied to various species, and not 

 lieing the oldest name, since the misleading crangorum of 

 Pabricius dates from 1798, and Latreille himself appears 

 to have confounded Leander serratus (Pennant) and Leander 

 squilla (Linn.), so that, to start with, the name of the host 

 is as uncertain as the name of the parasite. 



Bopyrus Helleri, Giard and Bonnier, 1890, in Leander 

 squilla, (Linn.), may, notwithstanding the above arguments, 

 be thought deserving of the old name squillarum. 



Bopyrus Fougerouxi, Giard and Bonnier, 1890, inLean- 

 <der serratus (Pennant), from, which the 'Bopyrus squillarum' 

 of the ' British Sessile-eyed Crustacea' was obtained. 



Bopyrus Rathkei, Giard and Bonnier, 1890, in Palcemon 

 rectirostris, Zaddach. 



Bopi/rus treillianus, Giard and Bonnier, 1890, in Palce- 

 <mon treillianus, Risso. 



Bopijrus xiphias, Giard and Bonnier, 1890, in Palcemon 

 sdplrias, Risso. 



Bopyrus palcemonis, Risso, a doubtful species in Alplieus 

 sp. (?) ' 



