158 Rathbun Revision of Nomenclature of the Bracliynra. 



be considered the type. Halimus, Milne Edwards, 1834, con 

 tained two species, aries and auritm. The latter was already the 

 type of Naxia Leach in Latreille, 1825, and the former the type 

 of Halimus Latreille, 1829. Auritus, 011 the contrary, has up to 

 this time been held the type of Halimus, aries having been put 

 in Hyastenus White, 1847, which genus now becomes a synonym 

 of Halimus. Halimus, it should be noted, was proposed by La 

 treille, in 1825, for u deux especes de la collection du Jardin du 

 Roi, et dont 1'une paroit etre tres-voisine du Cancer superciocisus 

 \_superciliosus] de Linne." As this is not sufficient to define the 

 genus, the name must be considered as a nomen nudum, at least 

 until its description in 1829. 



Platyonichus Latreille, Nouv. Diet. Hist. Nat., XXVII, 4, 1818, 

 was offered as a substitute for Portumnus, the orthography of the 

 latter name being considered too near that of Portunus; conse 

 quently Platyonichus must have the same type as Portumnus, viz., 

 P. latipes (Pennant, 1777). If Portumnus be restored, as it has 

 been by many writers, Platyonichus becomes a synonym of it, and 

 cannot be used for the species ocellatus, as this species was not 

 known to Platyonichus until 1825 (Latreille, in Encyc. Meth., 

 Entom., X, 151). Xaiva of MacLeay, 1838, is available for ocel 

 latus and its allies, the earlier Anisopas de Haan, 1833, being pre 

 occupied by Meigen (Illig. Mag., II, 1803) for Diptera. 



Stenorynchus Lamarck, 1818, was a name given to two species, 

 S. phalangium and S. selieornis Latreille. The former was already 

 a member of Macropodia, 1814. The second species is therefore 

 the type of Stenorynchus. It is said to be equivalent to Cancer 

 seticornis Herbst, 1788, which is congeneric, if not conspecific, 

 with Cancer Sagittarius Fabricius, 1793. Stenorynchus has always 

 been considered synonymous with Macropodia. 



2. The name of a composite genus tenable for one or more of its 

 species which do not belong in older genera. Platypodia is a name 

 given by Bell, Trans. Zool. Soc. London, 1, 336, 1835, to that group 

 of species included by Milne Edwards, 1834, under Cancer. This 

 last genus as defined by Milne Edwards contained none of the 

 Linnsean species of Cancer, and therefore the propriety of Bell's 

 action would not be questioned, except for the fact that previous 

 to the publication of Milne Edwards's Cancer, four of the species 

 contained therein had been assigned by de Haan, 1833, to Ater- 

 gatis&nd three other species to Acttea. Milne Edwards does not 

 specify the type of Cancer, but in illustration of the genus figures 



