ON DACTYLOMYS DACTYLINUS ETC. 405 



NOTE VII. 



ON DACTYLOMYS DACTYLINUS AND KANNA- 

 BATEOMYS AMBLYONYX. 



Dr. P. A. JENTINK. 



March 1891. 



(Plate 1). 



Dactylomys is the name of a genus of South-American 

 Rats, created in 1838 by Mr. Is. Geoffroy-Saint-Hilaire ') 

 for the reception of Echimys dactylinus of Mr. E. Geoffroy- 

 Saint-Hilaire (1817). Mr. Is. Geoffroy bestowed the specific 

 title typus on that animal and herein all the later authors ^) 

 have followed him , although according the rule of priority 

 it would have been more correct to retain the name given 

 by Mr. E. Geoffroy and to call the animal Dactylomys 

 dactylinus. But as it perhaps is a matter of euphony and 

 as Is. Geofifroy's name typus once had gained the victory 

 I followed in my paper in the Notes from the Ley den 

 Museum , 1887 , p. 224 , the bad example of my predecessors. 



Natterer brought home from his journeys in South- 

 America two rats , described ^) by Andreas Wagner , as 

 belonging to the mentioned genus , under the name Dac- 

 tylomys amblyonyx Natterer, with the following short diag- 



1) Compte rendu des seances de rAcademie des Sciences, 1838, p. 888; 

 Annales des Sciences naturelles. Seconde Série, T. X, 1838, p. 126, and Ma- 

 gasin de Zoölogie, 1840, p. 26. 



2) Except Dr. Trouessart, see Catalogue des Mammifères vivants et fossiles, 

 Rongeurs, 1881, p. 124. 



3) Archiv fur Naturgeschichte, 1845, p. 146. 



Notes from the Leyden Museum , "Vol. XIII. 



