248 On Species o/" Opisthophthalmus. 



2 to 4 much enlarged posteriorly ; 

 interocular area smooth ; hands 

 narrow, width less than length of 

 hand-hack ; fingers very long, the 

 movable more than twice the 



width of the hand austcrus, Karsch, rf , 



4 11 . Tail robust ; denticles of upper 

 keels hardly enlarged poste- 

 riorly ; interocular area gran- 

 ular ; hand stouter, its width 

 much excelling the length of 

 the hand-back, and more than 

 half the length of the movable 



digit macer, Thor., J • 



Z» 10 . Sterna of abdomen rugose, the last 

 granular; palpi and tail propor- 

 tioned almost as in macer. 

 a 12 . All the abdominal sterna thickly 

 granular ; first and second seg- 

 ments of tail longer than carapace, 

 which equals the fifth segment in 



length breviceps, sp. n., rf . 



b 12 . Not all the sterna evenly granular, 



the anterior at most slightly 



wrinkled. 



a 13 . Interocular area nearly or quite 



smooth ; hand much more finely 



granular ; anterior sterna 



smooth ; inferior median keels 



on first caudal segment nearly 



obsolete glabrifrons, Pet., J . 



b l *. Interocular area entirely gran- 

 ular ; hand strongly crested 

 and tubercular ; first caudal 

 segment strongly and granularly 

 keeled below pvgnax, Thor., J . 



EXPLANATION OF PLATE X. 



Fig. 1. Ojyisthophthalmus granifrons, sp. n. Carapace and chela, $. 



Fig. 1 a. Ditto. Genital operculum and comb of one side. 



Fig. 1 b. Ditto. Carapace and chela, <$ . 



Fig. 2. Opisthophthalmus nitidioeps, sp. n. Caiapace and chela, £. 



Fig. 2 a. Ditto. Genital operculum and comb of one side. 



Fig. 3. Opisthophthalmus breviceps, sp. n., J . Nat. size. 



Fig. 3 a. Ditto. First abdominal sternum. 



Fig. 4. Opisthophthalmus austcrus, Kartell. Brachium and manus of 



chela, J. 

 Fig. 5. Opisthaphthalmus macer, Thorell. Brachium and manus of 



chela, d . 



