154 Ratlihim — Revision of Nomenclature of the Brachyura. 



case should the name [of the genus] be transferred to a group 

 containing none of the species originally included in the genus." 

 The following names have been tluis transferred: Uca, Lttpa, 

 Leptrypodin, Clnrodius, Stenncionop-^, and Naxia of Leach, Halimus 

 and FlatyoiiicliKS of Latreille, and Stenorijnchus Lamarck. 



Uca was established by Leacli in Brewster's Edinburgh Ency- 

 clopaedia, volume VII, 1814,* for the Cancel- uca or v.ka Shaw, 

 1802, which he proposed to call Uca una. This is a fiddler crab 

 and not the Cancer Vca [;u;a] of Linnasus, 1767, and the Uca una 

 of the Marcgrave de Liebstad. 1G4S. Latreille in 1817 (Nouv- 

 Diet. Hist. Nat., XII, 517), rightly considering it a case of mis- 

 taken identity, attempted to improve matters by calling Leach's 

 Uca, Gelasimus, and giving the genus Uca to the Linntean spe- 

 cies ; but this proceeding is not sanctioned by the rules of today. 

 Before Leach's Uca was abandoned its existence was recognized 

 by Say in 1817. Uci Latreille may l)e known as Ucides, nov., 

 and its type species as Ucides cordatus (Lianasus, 1763) =Uca 

 una Marcgrave, 1648, which can no longer " be mentioned as a 

 rare instance of one that has been allowed to possess the names 

 by which it was figured and described centuries ago." (Stebbing, 

 Hist. Crust., p. 84.) 



In 1814, Edin. Encyc, VII, 390, Leach placed Cancer pelagicus 

 Linnseus, 1758, in the genus Liipa, and in the same year, in the 



* There has been some doubt as to the date of Leach's article, ' Crus- 

 taceology.' All the volumes of the Edinburgh Encycloi)a?dia bear the 

 date 1830 on the title i)age. Desmarest and other writers give the dates 

 1813-1814 for Leach's article. Dr. Stebbing, who has taken pains to col- 

 lect evidence on the subject, informs nie that volume VII of the Edin- 

 Inirgh Encyclopsedia gives no dates subsequent to 1814, the history of 

 Denuiiirk being curried down to .lanuary of that year. (See also Chal- 

 Icngcr Amphipoda, vol. I, p. 85, and quotation of Leach on page 155 of this 

 article.) It has been suggested that the original article appeared in 1813 

 and the Appendix in 1814. I believe, however, that the first two pages 

 of the article were published in 1813 and the remainder, including the 

 Appendix, in 1814. In the Edinl;)urgh edition of vol. VII, but not in the 

 Philadelphia reprint, the signatures of the lirst half are marked " vol. VII, 

 part I," and of the second half " vol. VII, part II." Part IT begins on 

 page 385, or the third page of Leach's article, and the inference is that 

 Part I apjieared in 1813 and Part II in 1814. All descri]>tions of genera 

 and species appear in Part II of the volume, and in this part of the original 

 article appear many references to the Appendi.K and Index, indicating that 

 the Appendix, although written later than the body of the article, was not 

 l^ublished later. 



