Revision of the Nomenclature of the Brachyura. 159 



Cancer limbatus. Later, 1839, Randall adopts the name Platy 

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

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

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

 Medzeus Dana, 1851, Euxanthus Dana, 1851, Hypoccelus* Heller, 

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

 taining the species Cancer limbatus 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 lim 

 batus ? 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 synonym, e. g., Goniopsis de Haan, 1833, contained 

 three species, two of which were already in the genus Grapsus, 

 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 Lophactasa. 



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

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

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

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

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

 Roissy, an XIII [1804-'5], Mollusca; Leptopus Latreille, Gen. 

 Crust. Insect., IV, Addenda, 383, 1809, Hemiptera ; Stenopus La 

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

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

 langipus included Libinia -f- Doclea -f- 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, Sys. Anim. sans Vert., 154, 1801, for 

 Inachus + 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 Inachus under the 

 name /. cormitus (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 Hypoccelus was a preoccupied name (see 

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

 species of Platypodia (Cancer sculptus Milne Edwards) which was referred 

 to Hypoccdus, would by the process of elimination be the type of Platy 

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

 Milne Edwards ( Platypodia Bell), and therefore could not legitimately 

 become its type. 



