340 40 



in the two species, but the carapace in A. inœquipes is much broader beliind, so 

 that it appears less hexagonal; the posterior margin is 1-5 times as great as the 

 distance across front and orbits in iiue(iinpes; it is just equal to that distance 

 in hexagonuin. In A. japonic a (Ortmann) (= Tritodynamia japonic a Ortmann, Zool. 

 Jahrb., Syst., VU, 693, pi. XXIII, fig. 5, 1894), the front is arcuate, and the second 

 leg is much longer than the third. 



Chasmocarcinops gelasimoides Alcock. 



Plate 1, fig. 10; Plate II, fig. 12. 



Chasmocarcinops gelasimoides Alcock, LXIX, 334, 1900; Illus. Zool. liivcstigiilor, Crust., pt. X, pi. 

 LXIl, figs. 2 and 3, 1902. 



Between Koh Kahdat and Koh Kut, fath., sandy clay; 1.9; 1 c? 3? (1 ovig.). 

 South of Koh Bidang, 9 fath., mud, shells; I. 18; 1?. North of Koh Kut, 10 fath.; 

 I. 23; 1 c?. 15 miles west of Koh Kut, 30 fath. (s. m.); I. 28; 1 c?. South of Koh 

 Kut, 17 — 20 fath., mud (large seine); I. 28; 8 c? 6 Ç 1 juv.; one male was in shell 

 of living Amussium pleuronectes Linnæus. 12 miles east of Koh Mak, 20 fath., large 

 seine; I. 28; 2 c? 1 ?• 10—12 miles west of Koh Chang, 20 fath., mud; I. 29; 7 c? 

 2 ?. 20 miles south of Koh Samit, 20 fath., mud; I. 31;.l J". 35 miles west of 

 Koh Chang, 30 fath., clay; I. 31; 1? ovig. 4—6 miles south of Koh Samit, 14—18 

 fath. ; II. 1 ; 3 c? 3 ?. 2 miles south of Koh Tulu, 10 fath., sandy mud, shells; II. 9; 1 c?. 



Family Gonoplacidæ. 



Subfamily Carcinoplacinæ. 

 Eucrate crenata de Haan. 



Eiicrate crenata Alcock, LXIX, 300, 1900. 



15 miles E. of Koh Chuen, 10 fath., shell bottom; II. 2 ; 1 ? juv. Koh Chuen, 

 30 fath., shell bottom; II; 1 c? juv. 2$ juv. 



Litocheira setosa (A. Milne Edwards). 



Litocheira setosa Ai.cock, LXIX, 315, 1900. 



15 miles E. of Koh Chuen, 10 fath., shell bottom; II. 2; 1 juv. 



A small specimen 26 mm. long and 37 mm. wide, in which the second lateral 

 tooth is acutely pointed. 



Litocheira cristata Rathbun. 



Litocheira cristata Rathbun, Pioc. IJiol. Soc. Washington, XXII, 111, 1909. 



Carapace flat except anteriorly where it is moderately deflexed. Regions 

 delineated, cardiac region almost quadrilateral. Antero- lateral region granulate. 

 Surface pubescent, and anterior border of carapace and of chelipeds and legs fringed 



