224 PERCY SLADEN TRUST EXPEDITION 



Saya de Malha, 29 fins., Sta. C 19 ; 1 ?. Providence, 39 fins., Sta. D 1 ; 1 ¥ ovig. 

 29 fins., Sta. D 3; 2 ?: 50 fins., Sta. D 11 ; 1 ¥ not typical. Amirante, 34 fins., Sta. E 9 

 1 2, 2 ? : 25—80 fins., Sta. Ell; 3 $ : 20—25 fins., Sta. E 13 ; 1 $ : 30 fins., Sta. E 21 



1 !j> : 20—44 fins., Sta. E 25 ; 1 ?. Seychelles, 31 fins., Sta. F 2 ; 1 $ : 34 fins., Sta. F 8 



2 i, 3 $ (1 ovig.). 



$, Sta. Ell, C. 1. 4-4 mm., C. b. 67 mm. 



In the largest specimen, considerably larger than the type, the carapace is not so 

 rough as in small specimens. Chelipeds of £ very unequal ; ringers of large chela broad, 

 pollex not deflexed ; prehensile teeth large ; tips crossing and no gape when fingers are 

 closed. Abdomen of $ constricted at the suture between 5th and 6th segments ; last 

 2 segments each broader than long ; last segment subtriangular. 



The $ from Sta. D 11 varies from the type in having the 1st and 4th teeth of the 

 lateral margin larger and yet not nearly so large as the 2nd and 3rd. 



127. Xanthias sp. 



Cargados Carajos, 30 fins., Sta. B 10 ; 1 ¥• C. 1. 4*1 mm., C. b. 6"2 mm. 



This specimen (the carapace of which is broken) is allied to X. cwmatodes 

 (MacGilchrist) (Illus. Zool. Investigator, Crust., xii. pi. 79, fig. 1). The carpal joints 

 of the legs, instead of having 2 humps on the dorsal margin, are simply spinulous. The 

 first of the 4 antero-lateral teeth is nearer the orbit and slightly in advance of the 

 subhepatic spinule. 



128. Xanthias tuberculidens, sp. nov. (Plate 18, fig. 9). 

 Saya de Malha, 125 fins., Sta. C 5; 1 $. 



A Xanthias with rough surface, subtruncate front, and prominent, tuberculiform 

 side teeth. 



Carapace distinctly hexagonal, § as long as broad, deeply areolated, rough with sharp 

 granules ; 4 prominent antero-lateral teeth, with narrow rounded tips, besides the small 

 tooth at the outer angle of the orbit ; first tooth smallest, third most prominent ; a 

 subhepatic tubercle between first tooth and orbit ; postero-lateral margins nearly straight. 

 Front little convex, a tooth at outer angle, a narrow median notch, edge crenulate. Inner 

 angle of orbit dentiform ; two equal, separated teeth below, the outer one separated from 

 the supra-orbital tooth by a large V-shaped notch. Flagella of antennae 2^ times as long 

 as width of orbit. 



Lower surface of crab granulate. Merus of maxillipeds with outer angle strongly 

 produced laterally. Male abdomen short, broad at base ; last two segments broader than 

 long. 



Chelipeds unequal in $, very rough with granules which form irregular bunches on 

 the wrist and some longitudinal lines on the hand. Arm with a few spinules above ; an 

 obtuse tooth at inner angle of wrist, with a very small one at its base. Fingers granulate, 

 deeply grooved, brown, edges irregularly toothed and meeting. 



Legs granulate, upper margin spinulous, last 2 segments hairy, a strong distal tooth 

 on merus, carpus cristate, with a truncate, proximal tooth. 



