696 DR. G. S. BRADY ON ENTOMOSTRACA [June 19,, 



Boeckella propinqiia G. O. Sars, Pacifische Plankton- Crustaceen 

 (Zoologisch. Jahrbuch. v. 1903), p. 636, Taf. 35. figs. 10 a-li. 



This species seems to be the commonest of all the lacustrine 

 Copepocla of New Zealand. It occurs abundantly in almost all 

 the gatherings submitted to me. It has been fully figured and 

 described by Professor G. O. Sars {loc. cit.) and by Mr. G. M. 

 Thomson. Mr. Thomson's specimens were found in a pond near 

 Canterbury, and those described by Sars were raised artificially 

 from mud collected in the same place. Those described by the 

 latter author under the name '■'■ j^rojnnqica" difi'er only very 

 slightly from the type species, chiefly in the greater length of the 

 anterior antennae and in the build of the fifth pair of feet, more 

 particularly in the males. But specimens referable to both forms 

 occur intermixed in various New Zealand gatherings, and I think 

 can scarcely be looked upon as distinct one from the other. The 

 pro2nnqi(,a-ioTm. is generally the longer and more deeply pigmented, 

 and I am disposed to think is really the fully developed condition 

 of triarticulata. 



The types of B. propinqiM were taken in a f reshv/ater pond in 

 D'Urville Island, New Zealand. 



Genus Oalamcecia*, gen. nov. 



Body slender and elongated ; posterior angles of the metasome 

 in \hQ female produced sharply backwards ; urosome of \hxQ female 

 four-jointed, of the male five-jointed ; caudal rami short and 

 rather broad. Anterior antennee of the female composed of 

 twenty-four joints; posterior antennse two-branched, the outer 

 branch six- (or seven ?) jointed and equal in length to the inner 

 branch. Mouth-organs as in Limnocalamus, except that the 

 anterior maxillipeds are destitute of strong terminal claws, being 

 simply setiferous. Inner branches of the first four pairs of feet 

 biarticulate, and, like the outer branches, bearing very long and 

 delicate marginal setse. Fifth pair of feet in both sexes two- 

 branched ; in the female the penultimate joint of the three- 

 jointed outer branch is produced into a strong marginal spine, the 

 inner branch is simply biarticulate : in the male (Plate XLIX. 

 fig. 9) the terminal joint of the outer branch of the right foot 

 forms a very long curved claw, the inner branch is simply bi- 

 articulate ; the foot of the left side somewhat smaller, its outer 

 branch short and club-shaped, inner branch elongated and 

 composed of a single joint. 



This is more nearly allied to Limnocalamus than to any other 

 described genus, but difiers as regards the two- jointed inner rami 

 of the swimming-feet and in the build of the fifth pair of feet in 

 the male. 



Oalamcecia lucasi, sp. n. (Plate XLIX. figs. 1-10.) 

 Female. Seen dorsally the outline is very narrow and elongated 

 * KaXapos, a reed; oixeio, I dwell. 



