1906.] OF THE NEW ZEALAND LAKES. 699' 



of the shell is covered with closely-set and irregularly sliape^l 

 rounded or pointed tubercles (figs. 1, 2, 3) : a prominent trans- 

 parent tu}>eicle in front of the middle and just within the dorsal 

 margin, tluough which the darkly coloured eye is conspicuous. 

 Colour dark grey. Length '77 mm. 



3fale. Tlie shell of the nxale, seen dor-sally (fig. 2), is more- 

 angular in outline, widest near the rounded, subti-uncate, posterior 

 extremity, abruptly tapered in front. The two paii-s of antenrue 

 are like those of JVotodromas monachus, the posterior pair with 

 very slender apical joints Cfig. 5) and with swimming-setfe reaching 

 beyond the apices of the terminal ungues ; the second joint beai-s 

 at its distal extremity a long hair with a delicately bulbovLS 

 base ; the teioninal unguis in the male is minutely bipectinate. 

 Mandible-palp (fig. 6) beaiing a minute branchial process which 

 has a few (4 or .5 ?; upward-pointing setie. The first pair of 

 maxillae (PI. XLVIII. fig. 6) of the usual type and provided 

 with a large branchial plate; second maxilla in the female 

 (PI. L. fig. 7) consLsiing of an expanded club-shaped lamina which 

 bears a hinge of plumed setfe at the distal extremity and a simple 

 fusiform palp near the base, between which and the apical fringe 

 are two stout plumose branchial filaments : in the male the maxilke 

 of the second pair form strong prehensile organs (figs. 8, 9), differing 

 somewhat on the two sides and destitute of branchial setae. The 

 feet of the first pair are of the usual t}'pe (fig. 10), but have an 

 unusually long apical claw ; those of the .second pair (fig. 11) bear 

 two slender apical sette, one of which (the longer) is reflexe^L 

 Caudal rami (fig. 12) .slender, with three slender, closely approxi- 

 mated apical setfe. The male sexual apparatiLS is of the usual 

 type (PI. XLTIII. figs. 8, 9) : a pair of simple, very prominent, 

 subspherical, pedunculated eyes (PI. L. fig. 1.3;, which are deeply 

 pigmented and liave a colourless transparent cor-nea 



HoMtal. About a dozen examples of this species were taken, in 

 a netting among reeds in Lake Waikare. Being pre-iewed mostly 

 in picric acid, the shells have lost their mineral substance and 

 become very thin and flexible, so that the norxoal characters are 

 not easily ascertained — especially the distinctive sexual characters. 

 I have no doubt, however, that this is the species described by the 

 Eev. R. L. King {loc. cit.) ; but his &gmeH are scarcely adequate, 

 and I liave here given drawings, so far as my material would 

 allow, of the more important parts. As regards the shell, some 

 allowance must be made for the softened, mernbr-anous condition. 

 The slight differences between this species and Soiodromas seem. 

 perhaps, scarcely to call for a separ-ate generic name, but the tenn 

 Kevyaho/raia. having been already proposed by ]ilr. Kinrr it may 

 very propeiiy be retained, at any r-ate provisionally. 



[Since v.T;iting the foregoing description, I find that J^ /«r<««- 

 ira<« has been dascribed and figured by Ya%Ta in a paper — " Die 

 Ostracoden vom Bismarck- Ar-chipel '' (Archiv f. ^Taturgesch 

 1901). Vdvra's .specimens were taken in the Lsland of Xeu- 

 Pommem. ]SIr. King's specimens were from Tasmania.] 



