CRUSTACEA NORTH PACIFIC EXPLORING EXPEDITION I33 



220. CHASMAGNATHUS CONVEXUS De Haan 



Chasinagnathus confc.vtis De Haan, Fauna Japonica, Crust., p. 56, pi. vil, 

 fig. 5. Milne Edwards, Melanges Carcinologiques, p. 166. 



( )ur specimen is a male, a little smaller than that figured by De 

 Haan. In this the lateral margins are sufficiently arcuated and 

 their notches rather broad. The granules of the surface are smaller. 



It was taken in the paddy fields, which are more or less covered 

 with fresh water, at Loo Choo. 



Genus HELICE De Haan 



221. HELICE TRIDENS De Haan 



Hclicc tridcns De Haan, Fauna Japonica, Crust., p. 57, pi. xi, fig. 2, and 

 XV, fig. 6. Milne Edwards, Mel. Carcin., p. 155. 



Taken on the shores of a muddy estuary at Simoda, Japan ; also 

 at Ousima and Loo Choo. 



Genus SESARAL\ Say 

 222. SESARMA INTERMEDIA (De Haan) Milne Edwards 



Pachysoma intermedium De Haan, Fauna Japonica, Crust., p. 61, pi. xvi, 



fig. 5- 

 Sesanna intermedia MiLNE Edwards, Mel. Carcin., p. 152. 



The specimens which are here referred to S. intermedia are some- 

 what broader than those of the species figured by De Haan, and the 

 hand is more rugose above. With the exception of the marginal 

 tooth behind the orbital angle, they resemble in nearly every respect 

 S. dehaaiii, of which this is possibly a variety. 



The color in life was yellowish-gray, mottled with brownish. 

 Hands white. 



Found in paddy fields and in mud along fresh water ditches on 

 the shores of the island of Ousima; also taken at Simoda and at 

 Hongkong. 



223. SESARMA SINENSIS Milne Edwards 



Sesarma sinensis Milne Edwards, Melanges Carcinologiques, p. 152. 



This species is briefly described by Milne Edwards as follows: 

 "Carapace presque carree et faiblement sillonnee. Mains arrondies 

 en dessus et verruqueuses, mais sans cretes pectinees. Pattes greles, 



