344 



44 



Scalopidia spinosipes Stimpson. 



Plate II, fig. 2. 

 Scalopidia spinosipes Alcock, LXIX, 325, 1900. 



Off Koh Kut, 6 fath.: I. 26; 1? juv. S. of Koh Kut, 17—20 fath., mud (large 

 seine); I. 28; 2 d* 2 ?. 20 miles S. of Koh Samit, 20 fath., mud; 1. 31; 3 c? 6 ? 

 (1 evig.). 35 miles W. of Koh Chang, 30 fath., clay; I. 31 ; 1 ? juv. 



The largest c? (Koh Samit) is 14 mm. long, 195 mm. wide. The third, fourth 

 and fifth segments of the c? abdomen are incompletely fused. 



Camatopsis rubida Alcock and Anderson. 



Camatopsis rubida Alcock, LXIX, 329, 1900. 



12 miles E. of Koh Mak, 20 fath., large seine; I. 28; 1 d. 



Megæsthesius Rathbun. 



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



Allied to Camatopsis Alcock (Investigator Deep-Sea Brachyura, p. 75, 1899) but 

 differs in having the eyes unpigmented, the movable part of the antennules not 

 only excluded from the fossettes, but immensely stout, the buccal cavern anteriorly 

 narrowed and arcuate, the outer maxillipeds touching each other, the ischium as 

 broad as long and broader than the merus, which is subtriangular and bears the 

 palp at its summit, exognath short and narrow. 



Megæsthesius sagedae Rathbun. 



Plate II, fig. 5. 

 Megœstliesius sagedœ Rathbun, Proc. Biol. Soc. Washington, XXII, 112, 1909. 



Carapace pentagona], 

 the long postero-lateral 

 borders parallel, forming 

 distinct angles with the 

 short antero- lateral bor- 

 ders which are in line 

 with the orbits. Surface 

 nearly naked, rough with 

 sharp granules, which on 

 the borders become spi- 

 nules; very convex fore 

 and aft, level from side 

 to side. Front about one- 

 fifth as wide as carapace, 



bilobed by a deep groove, lobes arcuate. Eyestalks rough like the carapace, not 



pigmented. Epistome small. Pterygostomian region swollen. 



Fig. 30. Megœsthesius sagedœ, type d', 2-7 mm. wide. 



