346 CRUSTACEA. 



Carapax nearly quadrate, sides converging, front considerably inclined, 

 antero-lateral margin one-emarginate, transverse lines of carapax 

 very minutely crenulate. Carpus smooth above ; hand smooth 

 above ; arm two to three-toothed at apex. Third joint of posterior 

 feet three-toothed at lower apex. 



Plate 21, fig. 9 a, male, natural size ; b, outer maxillipeds, enlarged 

 two diameters ; c, hand, natural size. 



Locality uncertain ; probably from the South American coast. 



Length of carapax of a male, seven lines; breadth, nine lines; 

 length of front, five and one-fourth lines. Near the simplex, but differs 

 in having the sides convergent, the lower apex of third joint of last 

 legs denticulate, and the carpus smoother. Also, the first joint of the 

 outer antennae is long linear transverse, and the process just inside of 

 it, reaching down from the front, is broad and truncate below; the 

 basal joint extends farther inward towards the medial line than the 

 inner side of this process. Third joint of outer maxillipeds not longer 

 than broad. 



G. innotatus, DANA, Proc. Acad. Nat. Sci. Philad., 1851, v. 249. 



GENUS PLANES, Leach. 



PLANES MINUTUS (Fabr.) 

 Gulf-weed, Atlantic. 



This long-known species has usually a dull yellowish colour, clouded 

 with brownish yellow. The male abdomen is quite regularly trian- 

 gular, with an obtuse apex, and the greatest breadth more than two- 

 thirds its length ; the third joint is not abruptly broader than the 

 following, but instead, the sides from the third joint are regularly 

 converging. The upper margin of the fourth and fifth joints of the 

 eight posterior legs is rather densely ciliate. 



Canceling marinus minimus qitadratus, SLOANE, Jamaica, xi. pi. 245, f. 1. 



Cancer minutus, FABRICIUS, Ent. Syst., xi. 443, and Supp., 343. 



Grapsus minutus, LATREILLE, Hist. Nat. des Crust., vi. 68. 



Nautilograpsus minutus, EDWARDS, ii. 90 ; GOODSIR, Ann. Mag. N. H., xv. 73. 



Grapsus cinereus, SAY, Jour. Acad. Nat. Sci. Philad., i. 99. 



