674 CLASS x. 



feet with last joint lamellose, lanceolate or oval. Shell suborbicular, 

 with anterior margin dentate, with a strong spine on each side pro- 

 duced above the second pair of feet. 



Sp. Matuta victor FABB., EUMPH. Ami. RariteitTc. Tab. vn. s, DESMAB. 

 Crust. PI. 7, fig. 5 ; in the Indian Ocean, also in the Red Sea. 



Orithyia DALD., FABR. Shell muricate oval, truncated anteriorly. 

 Fifth pair of feet terminated by an oval lamina. 



Sp. Orythia mamillaris FABB., DESMAB. Crust, PI. 19, fig. i, GUEBIN Iconogr., 

 Crust. PI. i, fig. 2 ; from the Indian Ocean and the coast of China. 



Mursia LEACH. 

 Platymera EDW. 



Calappa DALD., FABR. External antennas short, with basal 

 joint broad. Shell short, convex, broader posteriorly, covering 

 with its margin produced the contracted feet. First pair of feet 

 with chelae large, compressed, crested above, with inner concave 

 side excised at the outer margin of shell. Kemaining eight feet 

 with last joint styliform. 



Sp. Calappa, granulata FABE., Cancer granulatus L. (excl. Synon.), HEBBST 

 Krablen I. Tab. 12, figs. 75, 76, Cuv. R. Ani., 6d. ill, Crust. PI. 38, fig. i, 

 from the Mediterranean ; Calappa tuberculata FABB., DESMAB. Crust. 

 PI. 10, fig. i ; Red Sea, Indian Ocean, &c. 



Note. Add sub-genus Cainara DE HA AN. Sp. Calappa fornicata, 

 Cancer calappa L. 



ft Area of mouth quadrate, anteriorly remote from the margin 

 of shell. Maxilliform feet broad. 



Family XXXIII. Majacea DE HAAN, Oxyrhyncha EDW. 

 Space between the origin of middle antennse and the area of mouth 

 large, scarcely broader than long. Shell triangular or subovate, 

 anteriorly narrowed, mostly running into a frontal rostrum. Feet 

 mostly elongate, never natatory. 



Inachus FABR. (in part). Feet slender, very long, elongate; 

 second pair very often longer than first. Third joint of maxilliform 

 feet obtrigonal or obovate, sustaining the fourth on its apex. 



Leptopodia LEACH. Rostrum very long. Peduncle of eyes 

 short. 



