25 325 



Metopograpsus messor (Forskål). 



Metopograpsus messor Alcock, LXIX, 397, 19U0. 



Coast of Lem Ngob, 0—1 fath., stones, sand; XII; 1 c?. Koh Chang, 1 fath., 

 coral; I— III; 1 juv. 



Metopograpsus latifrons (White).' 



Metopograpsus latifrons Kingsi.ey, Pioc. Acad. Nat. Sei. Phila., 1880, 191. 

 Metopograpsus maculatus Alcock, LXIX, 398, 1900. 



Mangrove swamp, Lem Ngob; XII. 23, 24 or 27; 1 juv. Coast of Koh Kong; 

 I. 23: 1 d*. North of Koh Chang, under lea ves, seaweed, &c.; II. 10; 2 juv. 



Metopograpsus quadridentatus Stimpson. 



Metopograpsus quadridentatus Stimpson, Smithson. Misc. Coll., XLIX, 115, pi. XVI, fig. 2, 1907. 



Coast of Lem Ngob, 0—1 fath., stones and sand; XII; 1 c? 1 ? ovig. Koh 

 Chang, stony coast at low water; I; 1 J* 3Ç ovig. 



Subfamily Varuninæ. 

 Varuna litterata (Fabricius). 



Yaruna litterata Alcock, LXIX, 401, 1900. 



Mangrove swamp, Lem Ngob; XII. 23, 24 or 27; 1 Ç. Between Koh Mesan 

 and Koh Chuen, on and under plants, surface; II. 5; 1 juv. 



Camptandrium Stimpson. 



Camptandrium Stimpson, Proc. Acad. Nat. Sei. Phila., X, 106 [52], 1858; Smithson. Misc. Coll., XLIX, 

 137, 1907. 



Carapace hexagonal, with the antero-lateral margins oblique and dentate. 

 Fronto-orbital distance two-thirds, and front between one-third and one-fourth, the 

 greatest width of the carapace. Front steeply inclined. Orbits large, shallow; in- 

 ferior margin and infraorbital crest ap])roximated. Antennules oblique, in deep 

 fossæ; septum broad. Antennæ with the basal joint small, rounded; Ilagellum 

 standing in the orbital hiatus. 



Epistome of moderate length (fore and aft). Buccal cavity large, much broader 

 than long. Maxillipeds slightly or not at all gaping; endognatli wide, the ischium 

 not much longer than wide, inerus wider than ischium and wider than long, outer 

 margin convex, overlapping the exognath, outer angle strongly produced forward, 

 palpus articulating at the middle of the anterior margin. Exognath narrow. 



Chelipeds small and weak, much shorter, and in the male no more massive 

 than the legs and resembling those of the female of Uca (= Gelasimus). Fingers 

 hollowed at tip. Legs compressed, third pair longest; dactyli slender. 



Resembles Cyrtograpsus Dana' in its general aspect but dillers in the more 

 dellexed front, slender chelipeds and large maxillipeds. 



• Proc. Acad. Nat. Sei. Pliila., V, pp. 247 and 250, 1851. 



I). K. 1). Vidensk. Selsk. Skr., 7. Iliuklie. nulurviileiisU. du m^ilhcin. AW V. 4. 42 



