PANDAKUS. 95 



being armed with terminal claws ; the maxillipeds are 

 also furnished with small terminal but distinct claw- 

 like hooks. The other mouth-appendages are some- 

 what similar to those of the female. All the four 

 pairs of thoracic legs are biramose, with biarticulate 

 rami, and they differ from those of the female in being 

 provided with moderately long and densely plumose 

 setse. 



1. Pandarus bicolor Leach. 



(Plate XXI, fig. 2; Plate XXII, figs. 5-6; Plate 

 XXVI, figs. 4-19 ; Plate LVIII, figs. 1-8.) 



1816. Pandarus bicolor and boscii Leach. (74) pp. 405, 406, pi. xx, 

 figs. 1 and 2 and figs. 1-10. 



1840. Pandarus fiss if r on s M. Edwards. (43) p. 470. 



1850. Pandarus bicolor and boscii Baird. (4) pp. 288, 289, pi. xxxiii, 

 fig. 6. 



(?) 1854. Nogagus angustulus Gerst. (<?). (48) p. 193, pi. vii, figs. 17 

 and 18 (A 



1900. Pandarus bicolor T. Scott (< & ?). (112) p. 157, pi. vi, figs. 

 33-38 (c? & ?). 



1907. Pandarus bicolor G. B. Wilson. (148) p. 400, pi. xxvii. 



1907. Nogagus latus T. Scott. (117) p. 216, pi. xv, figs. 1-9 (<, im- 

 mature). 



Female. Body oblong, width equal to rather more 

 than a third of the entire length. Carapace widest 

 posteriorly, lateral margins slightly arcuate, converg- 

 ing towards the front, anterior margin with a small 

 median notch, frontal plates tolerably distinct, postero- 

 lateral corners not greatly produced. Thorax provided 

 with three pairs of dorsal plates ; first pair lateral and 

 of an ovate form and inclosing the second pair between 

 them ; the second pair terminating in broadly-rounded 

 lobes which scarcely reach beyond the ends of the 

 first, the combined width of the two pairs being 

 nearly equal to that of the carapace ; the posterior 

 margins of the two pairs of plates are nearly in a 

 straight line and have the appearance of four subequal 

 lobes ; the third pair about as wide as the carapace and 

 prolonged backward to near the middle of the genital 

 segment, separated posteriorly by a moderately deep 

 median sinus and terminating in two broadly-rounded 



