GRAPSOIDEA. 373 



Islands ; Tutuila and Upolu, Samoan or Navigator Islands ; Island of 

 Maui, Hawaiian Group. 



Length of carapax of male, ten and a half lines; breadth, nine and 

 three-fourths lines. The colour varies; sometimes a light grayish 

 purple and grayish brown, with claws purplish (Raraka) ; or, the same 

 with a longitudinal streak of light green down the middle of the back; 

 commonly brown or brownish yellow, with a bright yellowish green 

 streak along middle of back, as found at Earaka and elsewhere; at 

 Madeira, reddish brown. In the male, the arm projects two and one- 

 fourth lines beyond the extraorbital spine, which is just half its 

 length, as measured below ; in a female of like size, it projects about 

 three-fourths of a line. In a small pale-coloured male from the 

 Paumotus, four and a half lines long, it projects only half a line, or 

 about one-third of its length. The tomentose coat covers the whole 

 back, excepting a few linear spaces. The hand has an obtusish edge 

 above. 



In a female specimen from the Sandwich Islands, the two apical 

 spines of the front or beak are coalescent nearly to their tips, instead 

 of being divergent, so that they form a single spine with a bifid tip. In 

 another (male), from the same region, the apical spines have the usual 

 character, though shorter. 



Cancer planissimns, HERBST, iii. 3, pi. 59, f. 3. 



Plagusia clavimana, LATK., Gen., i. 34; DESMAREST, 127, pi. 14, f. 2; EDWARDS, 

 Crust., ii. 92. 



Acanthopits clavimanus, DE HAAN, Faun. Japon., 30; KRATJSS, Siidaf. Crust., 42. 



ACANTHOPUS ABBREVIATUS. 



Carapax subquadratus, non dblongus, supra omnino tomentosus, lineis 

 nudis nullis, fronte ac in pianissimo sed latiore; margine antero-late- 

 raU k-dentato dente 2do inconspicuo. Pedes maris antici cequi, 

 manu vix inflatd, supra sulcatd. Abdomen maris angustius, lateribus 

 excavatum. 



Carapax subquadrate, not oblong, above tomentose throughout with- 

 out any naked lines, front as in the planissimus, but wider; antero- 

 lateral margin four-toothed, second tooth inconspicuous. Anterior 



94 



