45 



345 



Antennules immensely slout, the last two segments of the peduncle wider 

 than the lobes of the front, the flagellum fringed with long hair which reaches to 

 the sternum when the antennules are applied to the ventral surface. Antennae 

 slender, crowded by the antennules away from the front. 



Chelipeds of the c? shorter and not much stouter 

 than the legs, pubescent, rough; wrist suboval, bearing 

 a spinule at the inner angle, fingers cylindrical, longer 

 than the palm, the lower margin of which is spinulous. 



Legs long and narrow, margins spinulous. 



Abdomen of c? widest at the third segment; third 



to fifth segments fused. Length of J' 27 mm., width 



2"7 mm., fronto-orbital width 1-8 mm., width of front 



n o fig- 31. Megœsthesius sagedæ, 



U'D mm. ,„ , n.T 1 



type o, 2'7 mm. wide, antero- 

 Singapore, 2—3 fath.; XII. 4; 1 c? type. ventral view. 



Subfamily Typhlocarcinopsinæ Rathbun. 

 The first segment of the male abdomen covers the whole space between the 

 last pair of legs. Otherwise, as in the Rhizopinæ, to which it bears the same 

 relation that theCarcinoplacinæ does to thePrionoplacinæ. The type of the subfamily is 



Typhlocarcinops Rathbun. 



Tgphlocarcinops Rathbun, Proc. Biol. Soc. Wasliington, XXII, 112, 1909. 



Differs from Typhlocarcinus Stimpson (cf. Alcock, LXIX. 321, 1900), chiefly 

 in having the first segment of the c? abdomen very broad, covering the whole width 

 of the sternum, and transversely grooved. Remainder of abdomen narrow. 



Type and only species: 



Fig. 32. Typhlocarcinops canaliculata, 



Koh Mak, c?, 34 mm. wide; a, carapace; 



6, abdomen; c, chela; d, maxilliped. 



Typhlocarcinops canaliculata Rathbun. 



Plate II, fig. 16. 



Typhlocarcinops canaliculata Rathbun, Proc. Biol. Soc. 

 Washington, XXII, 112, 1909. 



Carapace, chelipeds and legs sparingly 

 hairy on the margins. Carapace three-fourths 

 as long as wide, widest posteriorly, meso- 

 gastric region faintly marked. Lateral mar- 

 gins granulate, entire. 



Fronto-orbital width about three-fifths 

 of the total width of the carapace; nearly 

 half of the distance is occupied by the 

 front. The latter widens anteriorly, is strongly 



