On Gammarus campylops, Leach. 397 



arcuatis, basi Isevissime sinuato ; elytris crebre seriato-punctatis, 

 interstitiis minute irregulariter punctulatis : 

 (5, antennarum clava elongata, tibiis anticis longe bidentatis, tarsis 

 anticis gracilibus, posterioribus brevibus et crassis, pedum omnium 

 articulo ultimo magno, unguibus longis, medio fissis. 

 Long. 5 mm.; lat. max. 2-5 mm. 



Hah. Paraguay {Dr. Bohls). 



1 have seen only two male examples of this interesting 

 species, the type of which has been kindly presented to the 

 British Museum by Herr Carl Felsche. Although agreeing 

 in its essential generic characters with the two other species 

 of Hapalonychus, it is very different in appearance. It is 

 much smaller, black, and much more coarsely and irregularly 

 punctured. 



Trooinje. 



I have found that the species described by me in 1903 as 

 Clceotus acutipes is C, nitens, Guer., which therefore ranges 

 from Mexico to South Brazil. It is probably also nigerrimus, 



CIcBOtus puncticolUs, Har., must be renamed in consequence 

 of that name having been previously applied by Erichson to 

 C. glohosus, Say. It may be called C. haroldi. 



XLIX. — On Gammarus campy lops. Leach. 

 By Alfred O. Walker, F.L.S., F.Z.S. 



There has been an extraordinary amount of confusion in 

 regard to this Amphipod. To begin with the name : it first 

 appeared in the ' Edinburgh Encyclopaedia,^ Article " Crusta- 

 ceology," vol. vii. 1813, under the meaningless name camy- 

 lops — no doubt a printer's error : in the appendix to the 

 same article (1814?) it appears as camylosps. It is next to 

 be found in Dr. Leach's *' Arrangement of the Crustacea, &e.'' 

 in the ' Transactions of the Linnean Society of London,' 

 vol. xi. (1815) p. 360, as campylops, from the Greek kampulos, 

 crooked, and ops, eye — a perfectly appropriate name. And 

 here I may be permitted to say, with all due respect to the 

 law of priority, that when the first name published is 

 obviously an error, shortly afterwards corrected by the 

 author, it is surely better to adopt the corrected form. The 

 correct name is used by Desmarest in 1825, by Milne- 

 Edwards in 1840, and A. White in 1847 (List Crust. Brit. 

 Mus. p. 88), but the last-named author in the same List, 



