CEUSTACEA. 51 



1. MACPOPHTHALMUS, Latreille. 



1. MACEOPHTHALMUS JAPONICUS, Be Raan. 



Thorace lato-quadrato, ad latera obtuse dentato ; manibus (marium) latere exteriore lsevibus et inermi- 

 bus, interiore glaberrimis, carina superiore granulatis; digitis (in maribus) deorsum inilexis. 

 Japonice Suna gani, i. e., Cancer arenarius, quod se in arena abscondere solet. 

 Ocypocle (Macrophthalmus) Japonicus, De Haan, P. I. p. 54. 1. 15. f. 2. (mas) t. 7. f. 1. (femina.) 

 Hab, Insulas Meia-co-shirnahs et Japoniam. 



Carapace widely-quadrate, sides obtusely toothed ; the fifth joint of fore-legs, in the 

 male, smooth and unarmed on the outer side, very smooth on the inner side, granulated on 

 the upper keel ; claws in the male bent downwards. 



In Japanese Suna gani, i. e., Sand Crab, because it is in the habit of burying itself in 

 the sand. 



Hab. Meia-co-shimah Islands ; Adams. Japan ; De Haan. 



2. MACEOPHTHALMUS DEPLNITUS, White. 



Thorace anguste-quadrato, lateribus dentibus tribus, angulo canthi incluso, dente secundo latiore, dente 

 tertio parvo. 



Chelis articulis perlongis vix supra marginatis, digito superiore dente parvo prope basin ; digito in- 

 feriore sinu valde profundo, manu infra tuberculata, interne pilosa. 



Hab. Insulas Pliilippinas. 



Carapace narrowly-quadrate ; sides with three teeth, including the orbital angle ; the 

 second widest, turned up considerably, the third very small. 



Fore-legs with the joints very long, scarcely margined above ; movable or upper claw 

 with a very slight tooth near the base ; fixed or under claw with a very deep sinus ; fifth joint 

 tuberculated on the under side, hairy on the inside. 



Hab. Philippine Islands. 



3. MACEOPHTHALMTJS SEREATUS, White. 



Thorace anguste-quadrato, lateribus antice dentibus tribus robustis, postice carina subcrenulata. 

 Chelis, manu ab basin interne dilatata, longitudinaliter excavata ; digitis pilis longis densis obsitis ; 

 digito superiore, in medio, dente truncato. 



Pedibus posterioribus, parte superiore, spina prope extremitatem. 

 Hab. Insulas Philippinas. 



Carapace narrowly-quadrate, with three strong teeth on the sides in front, succeeded by 

 a slight somewhat crenated keel which margins the rest of the carapace. 



Fore-legs with the fifth joint dilated on the inside from the base, and longitudinally hol- 

 lowed out ; inside of both claws densely clothed with long hairs ; upper or movable claw 

 with a large truncated tooth in the middle. 



Hind-legs with a spine on the upper side near the end. 

 Hab. Philippine Islands. 



