'Revision of the Nomenclature of the Brachyura. 159 



Cancel- Umbatus. Later, 1839, Randall adopts the name Platy- 

 podia, coupling it with the same specific name, granulosus Riip- 

 pell, 1830 = limhatus Milne Edwards, 1834. Subsequently all the 

 species of Bell's Platypodia Avere assigned to other genera, viz., 

 Medtras Dana, 1851, Eaxanthus Dana, 1851, Hypoadus'-^ Heller, 

 1861, and Lopkadrea A. Milne Edwards, 1865, this last genus con- 

 taining the species Cancer Umbatus Milne Edwards. The ques- 

 tion now arises, should Platypodia be considered a synonym of 

 Atergatis and Actsea, or should it be retained for the species Ihn- 

 batusf In reviewing the genera of Brachyura, I find that in all 

 similar cases the name of the composite genus has not been 

 treated as a s^aionym, e. g., Goniopsis de Haan, 1833, contained 

 three species, two of which were alread}^ in the genus Grapstis, 

 yet the name Goniopsis has been used without question for the 

 third species. As a contrary decision would involve many need- 

 less changes. Platypodia is retained in place of Lophactsea. 



3. The name of a composite genus, when made up ivholly of older 

 genera, tenable for a component part requiring a name. — I propose to 

 restore the name Phalangipus Latreille, 1825, for Egeria Leach, 

 1815 = Leptnpus Lamarck, 1818 = Stenopus Leach in Latreille, 

 Encyc. Meth., Entom., X, 700, 1825, all preoccupied. (Egeria 

 Roissy, an XIII [1804- '5], IMollusca; Leptopus Lati'eille, Gen. 

 Crust. Insect., IV, Addenda, 383, 1809, Hemijjtera; Stenopus La- 

 treille in Desmarest, Dict.Sci. Nat., XXVIII, 321, 1823, Macrura.) 

 As originally defined, Encyc. Meth., Entom., X, 699, 1825, Pha- 

 langipns included Libinia + Doclea + Egeria, all genera of Leach, 

 1815. The name was never used subsequently. A precedent for 

 its restoration now in a restricted sense is to be found in Maja, 

 a genus formed by Lamarck, Sj's. Anim. sans Vert., 154, 1801, for 

 Iiiachus -f- Parthenope, both of Fabricius, 1798, and first restricted 

 by Leach, 1814, to the species Cancer squinado Herbst, 1785, which 

 was a component part of the Fabrician genus InaeJius under the 

 name /. cornutus (not C. cornutus Linnaeus, 1758). Maja or Maia 

 in its Leachian sense has been in use without question down to 



* It may be claimed that as Hi/poadus was a preoccupied name (see 

 page 164) it was not a genus in the proper sense, and that therefore the 

 species of Pluliipodia {Cancer sculplns Mihie Edwards) which was referred 

 to Hypoccelus, would by the process of elimination be the type of Platy- 

 podia. On the other hand, C. sculplns was an abnormal species of Cancer 

 jNIilne Edwards {= Pkttypodia Bell), and therefore could not legitimately 

 become its tj'pe. 



