394 MB, J. E. HENDERSON— A CONTRIBUTION 



Genus Xenophthalmus, White. 



162. Xenophthalmus pinnotheroides, White. 



X. pinnotheroides, White, Ann. Mag. Nat. Hist. vol. xviii. p. 178, pi. ii. fig. 2 (1846) ; Adams and 

 White, ' Samarang ' Crust, p. 63, pi. xii. fig. 3 (1848). 



Paineswaram, four males, one female (Thurston). 



The carapace of the largest male is 6 mm. long and 9 mm. broad. 



Distribution. Philippines (White); Hong Kong (Stimpson). 



163. Xenophthalmus obscurus, n. sp. (PL XXXVI. figs. 18, 19.) 

 Gulf of Martaban, a female (Oates). 



The carapace is moderately convex, glabrous, and somewhat uneven, with a decided 

 anterior declivity. The gastro-branchial grooves are rather deep, and faint sulci pass 

 forwards from them ; two slight epigastric swellings are present. The lateral margins 

 are ill-defined anteriorly, while behind they are not represented by any distinct margin. 

 The antero-lateral margin is a very slightly marked ridge, and below it on the pterygo- 

 stomial area two similar and almost parallel ridges are seen. The mid-branchial region 

 is slightly better defined by the lateral margin, but the ridge here is not continuous with 

 the antero-lateral ridge, and posteriorly it curves on to the surface of the carapace to 

 form a prominent wrinkle, which extends to the posterior limit of the gastro-branchial 

 groove. The eyes are placed somewhat obliquely, and are distinctly visible in the orbital 

 fissures. The front when viewed from above appears obtusely bilobed, but when viewed 

 from before it is seen to have the sides parallel and the free end truncated, with a median 

 and two lateral slight projections. 



In the single specimen — a female — the chelipedes are very minute and slender, being 

 even shorter than the last pair of legs ; superior and inferior marginal ciliated lines are 

 seen on the hand. The ambulatory legs are faintly pubescent towards their apices, and 

 the meropodites of the first three pairs are armed on the anterior and posterior margins 

 with short curved spinules, which are best marked on the posterior margins. The ab- 

 dominal segments are glabrous externally. 



The carapace is 6"5 mm. long and 7 mm. wide ; the first leg is 10 mm. long, the second 

 leg 11 mm., the third leg 17 mm., the chelipede 7 mm., and the last leg 10 mm. 



I have compared the specimen with the types of X. pinnotheroides. In White's species 

 the front is obtusely rounded and without distal projections, the orbital fissures are 

 deeper and pass straight, not obliquely, back on the carapace ; there is a granular line on 

 the postero-lateral margin of the carapace, and a second line on the post-branchial region ; 

 lastly, there is only a single obscure ridge on the pterygostomial area. 



Genus Elamene, Milne-Edw. 

 164. Elamene unguiformis, De Haan. 



E. unffuiformis, De Haan, Crust. Japon. p. 75, tab. xxiv. fig. 1 (1850). 

 Gulf of Martaban, an adult male (Oates). 

 Distribution. Japan (De Saan). 



