307 



obtuse-angled prominence, the anterior margin of which is nearly transverse and 

 in line with the eye when viewed from above; behind it a smaller prominence, 

 from which a row of tubercles curves backward and strongly upward to a point 

 opposite the middle of the cardiac region. Posterior margin slightly convex. Front 

 and orbits together nearly one-half as wide as the carapace; front with a median 

 furrow, edge subtruncate, faintly bidentate, outer angles rounded. Orbit small, 

 orbicular. 



Outer maxilliped strongly bent near its middle so that 

 the merus of the endognath is nearly at a right angle to 

 the ischium. Abdomen of female with third to sixth seg- 

 ments fused. 



Chelipeds knobby like the carapace; arm widening a 

 little distally, palm extremely thick near its proximal end, 

 fingers no longer than palm, opening verticallj', curving in- 

 ward, grooved, ridges finely granulate, prehensile edges 

 evenly denticulate and overlapping, the dactylus lying within 

 the pollex, and nearly as wide as the poUex. 



This species differs from those hitherto described, in 

 lacking conical tubercles on the carapace, and in the palm 

 being as long as the fingers. 



Dimensions. — Female, length 3-7 mm., width 45 mm. 



Localities. — Between Ivoh Mesan and Koh Chuen, 15 fath.; II. 6; one ? 

 ovigerous, type. Between the same islands, 30 fath., stones; II. 5; one Ç adult. 



Fig. 1. 



Heteroniicia mesanensis, 



type 9, 4-5 mm. wide: 



a, chela; b, leg. 



Ebalia Avoodmasoni Alcock. 



Plate 1, fig. 17. 

 Ebalia woodmasoni Alcock, LXV, 188, pi. VII, fig. 3, 1896. 



Koh Kahdat, 1 fath., sandy bottom, sponges, dead corals; I. 11; 2 ? ovig. 

 Koh Kahdat, 4—5 fath., sand, stones, coral; II. 15—18; 1 ? ovig. 



These specimens agree well with Alcock's description, but not so well with 

 his figure, which represents the front considerably wider. The largest female is 

 67 mm. long, 67 mm. wide. 



Nucia tuberculosa A. Milne Edwards. 



Nticia tuberculosa A. Milne Edwards, Nouv. Arch. Mus. Hist. Nat., X, 44, pi. II, lig. û, 5 a, 1874. 



Between Koh Mesan and Koh Chuen, 30 fath., stones; II. 5; 1 c? 1 ? immature. 



Surface of body and limbs closely covered with acute granules or tubercles. 

 Carapace subglobular, slightly hexagonal ; a little broader than long, with the front 

 set off by a furrow. Regions faintly indicated. Front more than one-third width 

 of carapace. Merus of maxillipeds sharply acuminate. Chelipeds not much longer 



