208 DR. G. S. BRADY ON THE [Feb. 1, 



Oandona rostrata Brady & Norman. 



1889. Candona rostrata B. & N., (2) p. 101, pi. ix. figs. 11, 12 ; 

 pi. xii. figs. 21-31. 



1891. Candona rostrata Yavra, (6) p. 40, fig. 10. 



1900. „ „ G. W. Miiller, (5) p. 23, pi. v. figs. 2, 



3, 7-14. 



The much produced anterior beak of the shell forms a very 

 distinctive character, and another good diagnostic point is to be 

 found in the very unequal lengths of the two terminal claws of 

 the caudal rami ; this does not occur, so far as I am aware, in any 

 other membsr of the genus, though Hartwig figures a similar 

 condition in the male of his C. marchica, but this species he 

 identifies with the C. rostrata of G. W. Miiller, and this latter I 

 take to be identical with the C. rostrata Brady & Norman. If this 

 be really so, Hartwig's name C. marchica has no locus standi 

 whatever. 



Candona euplectella Robertson, MS. 



1889. Candona euplectella Brady & Norman, (2) p. 105, pi. ix. 

 figs. 7, 8, 8a. 



1900. Paracandona euplectella G. W. Miiller, (5) pi. ix. 



figs. 1-9, 14. 



1901. Paracandona euplectella W. Hartwig, (3) p. 126. 

 Several Scottish localities for this species were noted in the 



Monograph of Brady & Norman. In addition to these I have to 

 thank Mr. R. Gurney for specimens from Sutton Broad, Norfolk, 

 and Mr. Scourfield has taken it also in Oatfield Fen, Norfolk. It 

 has been recorded in Germany by W. Hartwig and G. W. Miiller. 

 Hartwig, in 1899, proposed to constitute a subgenus* of 

 which C. euplectella would be the only known member, the 

 characters of which depended chiefly on the number of joints of 

 the posterior antennae. But these and other minor characters 

 seem to me too trivial to warrant the separation of a new sub- 

 genus. 



Genus Candonopsis, Yavra. 



This genus was by Yavra separated from Candona on the 

 strength of the following characters. The second pair of antenna? 

 are, in the male, six-jointed, and have two " sense organs " on the 

 fourth and fifth joints ; the mandibular palp is exceedingly long 

 and slender ; the second pair of maxilla? have a branchial append- 

 age of three plumose filaments ; the caudal rami are slender and 

 have no setae on the posterior margin. 



These characters were founded on the male only, the female 

 being unknown to Herr Yavra, but they apply likewise to the 

 female. The only hitherto recognized species of the genus is 

 C. kingsleii Brady & Robertson. 



* " Candona euplectella (Robertson), bildct eine sclbstiindige Gattung," Zoologiscb 

 Anzeiger, Bd. xxii. no. 592, 1899. 



