TO INDIAN CAEC1N0L0GY. 347 



may be specific and not generic. In some respects this genus is intermediate between the 

 Subfamilies Schizophrysinae and Pericerinae of Miers ; it at least illustrates the difficulty 

 of assigning a place in either of these groups to some forms. The genera to which it 

 appears most closely related are Schizophrys, White, and Microphrys, Milne-Edw. In the 

 first of these the rostral spines carry secondary lateral spinules, there is no distinct 

 supraorbital spine, the upper orbital margin shows two fissures, and the merus of the 

 external maxillipedes is not produced externally and distally. In the second, to which 

 it is perhaps more nearly related, the basal antennal joint is considerably broader, with a 

 longer terminal spine, the rostral spines are longer, the orbits more complete below, 

 and the chelipedes are enlarged in the male, with acute fingers. It also bears con- 

 siderable resemblance to the American genus Niemausa, A. Milne-Edw., belonging to 

 the Mithracinse, but in this the orbits are well-defined, the basal antennal joint broad 

 and with two external spines, and the merus of the external maxillipedes is not specially 

 produced at its distal external angle. 



20. Hoplophkys Oatesii, n. sp. (PI. XXXVI. figs. 1-4.) 



Gulf of Martaban, a male ( Oates). 



The gastric region of the carapace is prominent, with two rows of spines arranged in 

 curved lines, the anterior row (convex anteriorly) consisting of seven spines — three small 

 spines on each side of a central slightly larger one, the posterior row (convex posteriorly) 

 of three spines, the middle one of which is larger than any other on the gastric area and is 

 somewhat broadly compressed laterally. The cardiac area with two spines, slightly less 

 prominent than the posterior gastric one, arranged in transverse line, and two still smaller 

 and obtuse spines on the genital area. The branchial area with three spines — an anterior 

 one near the branchiogastric groove, which is the largest of all the spines on the carapace, 

 a small posterior one placed in a line which passes between the cardiac and genital spines, 

 and a large lateral one which is distinctly bifurcate, on the side margin of the carapace. 

 There is a single short spine on the hepatic area a slight distance behind the external 

 orbital angle, and a spine on the carapace internal to and smaller than the supraocular 

 spine. Groups of short curved hairs occur on the frontal, gastric, and branchial regions, 

 but otherwise the surface is perfectly smooth between the spines. 



The chelipedes present a few spines on the upper surface of the merus, especially 

 towards its distal end ; the carpus has about half a dozen short obtuse spines on its upper 

 surface ; the hand has well-developed superior and inferior basal articular tubercles at 

 the carpal articulation, and a single tubercle about the middle of the upper surface, while 

 elsewhere it is smooth and glabrous ; the fingers are finely toothed, witli a more prominent 

 tooth near the base of the dactylus, and the distal halves of the fingers are in contact. 

 The ambulatory legs are spinose superiorly, the spines being most prominent at the distal 

 ends of the meri and on the carpi ; the dactyli with a few minute teeth on the proximal 

 half of the posterior margin. The male abdomen is furnished with a single rounded 

 elevation on each segment except the third, which has three. All the spines on this 

 species are stout in proportion to their length, but with their apices more or less acute. 



