338 CRUSTACEA. 



Grapsus STRIGOSUS (Herbst), Latreille, 



Plate 21, fig. 2, outer maxillipeds, natural size. 



Valparaiso, Chili. 



Length of carapax of a male, two inches ; breadth, two inches and 

 two lines ; length of front, ten and a half lines ; height, three lines. 

 The front is quite different in proportions from the pictus, and corre- 

 . sponds with the shorter epistome. The third joint of the posterior 

 legs (like that of the other legs), in our specimens and in Herbst's 

 figure, is three-dentate at its lower apex, instead of entire, like pictus. 

 The inner oblong acute process to carpus is narrow and thorn-like. 

 The praBmedial front projects prominently over the surface below. 

 The fifth joint of the eight posterior legs is short, or less than three 

 times its length. The third joint of the second pair of legs is but little 

 shorter than that of the third pair — about one-fifth shorter. The angle 

 between the line of the back and the front is 120° to 130°. The pro- 

 cess (in our specimen) between the orbit and the antennse is quite 

 long and oblique, reaching as far as the front. 



Cancer strigosus, Herb st, pi. 47, f. 7. 



Grapsus strigosus, Latreille, Hist. Crust., vi. 70; Edwards, ii. 87. 



Goniopsis strigosus, De Haan, Faun. Japon., 33. 



Grapsus planifrons. 



Nudus. Frons fere horizontalis, sat latus. Mar go carapacis lateralis 

 bene arcuatus, antero-lateralis bi-emarg hiatus. Epistoma brevissimum. 

 Articulus maxillipedis extemi Stiiis vix longior quam latus. Pedes 

 antici sat crassi, raanu supra pustulald, extus infraque Icevi; brachio 

 apicem anticam 5-&-denticulato. Pedes 8 postici valde eompressi, 

 articido 3tio pedis postici ad apicem inferiorem integro, articulo penul- 

 timo supra scabro. 



Naked. Front nearly horizontal, rather broad; lateral margin of 



