CYCLOPOIDEA. 1089 



5-articulatus segrnento postico perbrevi. Antennce anticce corpore paulo 

 breviores, femirise marisque iis E. communis fere similes, seta ante- 

 penultimd posticd brevissimd. Setce caudales abdomine breviores, 

 secundd feminae fere corporis longitudine, maris abdominem paulo 

 superantibus. 



Cephalothorax naked, elliptical, sides of head arcuate, the posterior 

 angles of thorax a little elongate, but not acute, in male ^.ve seg- 

 ments, in female four segments. Anterior antennae a little shorter 

 than the body, nearly similar to those of the communis, doubly 

 curved, and tips posterior to beak, posterior antepenult seta minute. 

 Caudal setae straight, second nearly as long as body, in female 

 slightly longer than abdomen in male. 



Plate 77, fig. 4 a, female, enlarged ; 4 b, abdomen of another speci- 

 men. Fig. 5 a, male, enlarged ; b, genital or posterior feet ; c, one 

 of the same. 



Male and female, collected in the Straits of Banca, east of Sumatra, 

 March 1, 1842. 



Length, one-tenth of an inch. Colourless, nearly ; a little red about 

 the mouth and posteriorly. 



We make the same remark with regard to the male and female of 

 this species as of the last. The species is near the communis: but 

 the front is laterally arcuate ; the setae of longer branch of posterior 

 antennae are longer than the branch, the abdomen in the female has 

 a short apical joint, making five in all. The ovarian sac of the female 

 contained twelve eggs. The internal ovaries were distinct, and 

 appeared as a convoluted mass, extending either side of the body as 

 far as the mouth. The genital feet are nearly as in the preceding. 

 The basal joint of the subulate branch is more than twice as long as 

 broad, and the second is but little longer ; the third abruptly narrows 

 from one side a short distance from base. The other leg has the 

 fourth joint, or thumb, quite thin in its thumb part, and there is an 

 indentation, or possibly articulation, in the subulate finger, opposite 

 the apex of the thumb or immoveable finger. The anterior antennae 

 of the male are slightly bent at the eleventh joint from the apex, 

 and also at the second or third joint ; the part beyond the eleventh 



joint is slightly arcuate. 



273 



