COEYOiBUS. 33 



fig. 14 a, and PI. LXXXIII, fig. 11 a a). Anterior 

 antennae 6-jointed, short; posterior uncinate, power- 

 fully prehensile, terminal claw much longer in the 

 male than in the female. Mandibles (PI. LXXXIY, 

 fig. 10) slender, divided into two apical teeth {a), and 

 bearing a minute setiferous palp (b) ; maxilla (fig. 

 10 c) composed of a single lamina, which bears several 

 marginal laciniee, and near the middle a crescentic 

 row of small setae (see also PL LXXXIV, fig. 9). First 

 pair of foot-jaws short and stout, alike in both sexes, 

 apex produced into a stout hook-like spine, inner 

 margin bearing several setae (fig. 11). Posterior 

 foot-jaws elongated, 3-jointed, forming a strongly 

 uncinate prehensile hand (PL LXXXI, figs, 16, 17), 

 the claw very much larger in the male^ First, second, 

 and third pairs of feet having both branches S-jointed, 

 (PL LXXXIY, fig. 12) ; inner branch of the fourth pair 

 (fig. 13) rudimentary, 1-jointed; fifth pair (PL LXXXI, 

 fig. 18), rudimentary, composed of a single small 

 setiferous joint. Last joint of the cephalothorax 

 (PL LXXXIY, fig. 14 b) very small and partially over- 

 lapped by the penultimate joint. Frontal eyes two, 

 each composed of a single large, colourless, highly 

 refracting lens, situated near the bases of the anterior 

 antennae. " Conspicilla (lentes frontales) fere unita, 

 maxima ; oculus impar parvulus ; oculi superiores 

 remoti, corpori pigmentato styliformi, plus minusve 

 curvato " {Glaus). 



Dana notes the absence of the basal appendages of 

 the abdomen (fifth pair of feet) as a character of the 

 genus ; these, however, though present in such species 



VOL. III. 



