crustace;a north pacific e;xploring expedition 133 



220. CHASMAGNATHUS CONVEXUS De Haan 



Cliasmagnatlius coiivexus De Haan, Fauna Japonica, Crust., p. 56, pi. vii, 

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



Onr 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 



Hclice tridens 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 SESARAIA Say 



222. SESARMA INTERMEDIA (De Haan) Milne Edwards 



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



fig. 5. 

 Sesarma intermedia ]Mii.nE Edwards, Mel. Carcin., p. 152. 



The specimens which are here referred to S. iutcnitcciia 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 rcsjiect 

 5". dchaoiri, of \vhich this is possibly a variety. 



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

 Plands white. 



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

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

 1 longkong. 



223. SESARMA SINENSIS Milne Edwards 



Sesarma sinensis Mii.nk ICdwakds, Melanges Carcinologiques, p. 152. 



This species is brirlly described by Milne Ivlwards as follows: 

 "Carapace presque carree et faiblcment sillonnce. Mains arrondies 

 en dessus et verruqucuses, mais sans cretes pcctinees. [\'ittes greles. 



