404 CRUSTACEA. 



truncate vel arcuato. Tarsi lati, postici 4tis vis angustiores. Antennas externae 

 breves, articulo 2do processu auriculiformi instructo, 3tio cordiformi. Articulus 

 maxillipedis externi 3tius 2do parce brcvior. Sternum inter pedcs 2dos lineare. 



G. 3. RANILIA, Edwards. Carapax antice non angustior, fronte arcuato. Pedes 

 uti in Raniua. Antennae externaa basi processu auriculiformi non instructse, 

 articulo 3tio crasso, cylindrico. Articulus maxillipedis externi 3tius 2do longior. 



G. 4. NOTOPUS, De Haan.* Carapax antice non angustior, margine antico iato, 

 paucidentato, superficie fere laevi. Pedum 2doruui Stiorum 5torumque tarsi 

 angusti, pedibus 5tis parce minoribus. 



G. 5. LYREIDUS, De Haan.'f Carapax antice latera convergeus, margine antero- 

 laterali valde obliquo, rectiusculo, margine antico angustissimo. Pedum 2dorum, 

 Stiorum 5torumque tarsi angusti, pedibus 5tis parvulis, fere filiformibus. 



G. 6. COSMONOTUS, White.\ Carapax plerumque uti in Lyreldo. Pedes postici 

 4tis parce minores. 



RANINA SERRATA, Lamk. 

 Sandwich Islands. 



Cancer raninus, LlNN., Mus. Lud. Ulr., p. 130. 



Ranina serrata, LAMK., Syst., 256, and Hist, des An. sans Vert., v. 225. 



Ranina dentata, LATREILLE, Encyc. x. 268 ; EDWARDS, Crust., i. 194, pi. 21, figs. 



4, and Guv., pi. 41, f. 1 ; DE HAAN, Faun. Japon., p. 139, pi. 34, 35. 



SECTION II. ANOMOURA MEDIA. 



SUBTRIBElV. HIPPIDEA. 



THE genera of Hippidea, thus far described, are distinguished as 

 follows by Edwards : 



ALBUN^A, Fair. Antennae externaa breves. Pedes antici subcheliformes. 

 ALBUNHIPPA, Edw. Antennae externse longae. Pedes antici subcheliformes. 



* Faun. Japon., 136, pi. 35. 

 f Faun. Japon., 136, pi. 35. 

 J Voy. Samarang, 60, pi. 13, f. 3. 



Arch, du Mus. d'Hist. Nat., ii. 474. Blrpharipoda, Dr. J. Randall, Jour. Acad. 

 Nat. Sci. Philad., viii. 130. 



