8 4 



larger than walking legs; fingers widely gaping. Joints of 



walking legs cylindrical; first pair with unequal teeth at 



inner (hind) margin of meropodites Baruna Stebbing l ) 



Teeth at lateral margins of carapace not serrulate, flattened 



and separated by very narrow notches; carapace sub- 



circular. Merus of ext. maxillipeds about as broad as long, 



and shorter than ischium Pseudograpsus H. Milne-Edw. 



9. Merus of ext. maxillipeds broader than long and shorter 



than ischium Utica White 



Merus of ext. maxillipeds as long as, or longer than, broad 10 

 10. Front nearly half as wide as carapace; lateral margins 



three-toothed on either side Brachynotus de Haan 



Front not more than one-third the breadth of carapace; 



lateral margins usually four-toothed on either side . . Eriocheir de Haan 

 1 1 . One tooth behind ext. orbital angle. Suture between ischium 



and merus of ext. maxillipeds horizontal Perigrapsus 'Heller 3 ) 



Two teeth behind ext. orbital angle. Suture between ischium 



and merus of ext. maxillipeds very oblique .... Gaetice Gistel 3 ) 



Varuna H. Milne-Edwards. 



1830. Varuna H. Milne-Edwards. Dict. cl. d'Hist. nat., t. 16, p. 511. 

 1835. Trichopus de Haan. Faun. Japon., p. 32! 



Carapace depressed, flattened; front horizontal, at least in adult individuals, but apparently 

 somewhat oblique in young specimens, with the anterior margin quite straight. The merus ot 

 the external maxillipeds is strongly auriculate, and the exognath is rnuch narrower than the 

 ischium. The last three joints of the walking legs are much flattened, and heavily fringed at 

 both margins. 



Key to the species : 

 Carapace perfectly hairless. Upper orbital margin fissured. Epibranchial 



teeth well defmed V. litterala (Fabricius) 



Carapace and legs thickly covered with a hairy fur. Upper orbital 



fissure scarcely present. Epibranchial teeth separated by an indistinct 



notch V. tomentosa Pfeffer 4 ) 



1) Spolia zeylanica, v. 2. prt 5, 1904, p. 3, with the single species B. socialis (p. 3, pi. \ A\ found in brackish water (Lake 

 Negombo) at Ceylon. 



2) Verhandl. Zool. Bot. Gesellsch. Wien, 1862, p. 522: Reise «Novara", Crust., 1865, p. 50. There is only one species, P. 

 'sus Hellet- ("Novara", p. 50, pi 5, f. 1) occurring at Tahiti. 



3) The name Gaetice Gistel has been substiuited by Miss RATHBUN (Smithson. Inst., Miscell. Coll., v. 49, 1907, p. 128, note 

 to STlMPSON's memoir on North Pacific crabs), the original names Platynotus de Haan (Faun. Jap., 1835, p. 34 and Platygrapsus Stimpson 

 (Proc. Ac. Nat. Sc. Philadelphia, 1858, p. 104) being both preoccupied. There is probably only one species G. depressus (de Haan) 

 (Faun. lap., 1835, p. 63, pi. S, f. 2) from Japan, another species, G. convexiusculus (Stimpson) (see Smithson. Inst., Miscell. Coll., v. 49, 

 1907, p. 128, pi. 17, f. 3) from the Loo-Choo Islands, being most likely not distinct. 



4) Jalub. Hamb. wiss. Anst., Jahrg. 6, 2., 18S9, p. 30. In fresh water near Zanzibar. 



84 



