author; but as the name Ily abates proposed had been preoccupied, it was in 

 1874 replaced by Brandy & Robertson with that of Krithe. In addition to the 

 type species described below, a few nearly allied species have been recorded 

 by Brady and by G. W. Mtiller. 



73. Krithe bartonensis, (Jones). 



(PI. LXXVII). 



Cytherideis bartonensis, Jones, Tertiary Entomostraca, p. 50, PI. V, figs. 2, 3. 

 Syn: llyobates prcetexla, G. O. Sars. 



Specific Characters Female. Shell, seen laterally, oblong oval in shape, 

 somewhat higher behind than in front, greatest height about equalling half 

 the length, dorsal margin slightly arched and joining the hind edge by a quite 

 even curve, ventral margin almost straight, anterior extremity well rounded off, 

 posterior rather broader and somewhat obliquely blunted, with the lower corner 

 almost rectangular; seen dorsally, oblong ovate in outline, tapering in front 

 to a sharp point, posterior extremity blunted and inflexed in the middle; 

 greatest width somewhat less than half the length. Surface of valves without 

 any distinct pittings, but provided with scattered very small tubercles and a 

 few fine hairs at each extremity; marginal zone well marked both in front 

 and below, and of somewhat various width;, hyaline border of anterior edge 

 rather .broad, and very conspicuous in fresh specimens. Anterior antennae 

 with the terminal part scarcely as long as the distal segment of the basal part 

 and armed with about 7 spines, 3 of them attached to the middle joint, last 

 joint very short, with 3 spines. Posterior antennas with the apical claws very 

 slender. Legs with only a single seta on the anterior border of the basal part. 

 Posterior extremity of body blunt at the end. 



Male. Shell of rather smaller size than in female and much narrower, 

 seen laterally, almost cylindrical in shape. Left 2nd leg powerfully developed, 

 with the 2 joints of the terminal part considerably thickened, and the apical 

 claw very strong. Copulative appendages with the basal part much expanded, 

 rounded triangular in shape, and sending of below a long rod-like process 

 curving backwards; terminal part comparatively short, and acutely produced 

 both in front and behind. 



Colour light yellowish brown, by the translucent body; limbs bright yellow. 



Length of adult female 0.82 mm., of male 0.76 mm. 



Remarks. This peculiar form was recorded as early as the year 1856 by 

 Jones from fossil shells, and referred by him to the genus Cytherideis. It was 



