1885.] ON A NEW RODENT OF TUE GENUS CCELOGENYS. 161 



The Genoa specimen measured, according to Dr. Gestro — total 

 length 377 millim., length of snout 53 millim. 



As has been already stated (p. 155), e\en in the largest speci- 

 mens of E. acanthion, with a total length of 440-448 millim., the 

 length of the snout does not exceed 53 millim. ; and it may there- 

 fore be taken as granted that E. lawesi has the snout decidedly 

 longer than E. acanthion. 



The description of the covering of the skin and the colour does 

 not seem to show any definite ditference. Certainly Mr. Ramsay 

 says oi E. lawesi, " Some of the long cylindrical spines are altogether 

 white, some all black, some })articoloured with white or black tips." 



To this can be noted, that altogether white spines are very scarce 

 or absent in all specimens of E. acanthion, and that none of the 

 particoloured spines have white tips but these are always black-tipped. 

 Furthermore the hairs of the back as stated above are perfectly 

 hidden between the spines in E. acanthion ; while Mr. Ramsay 

 savs of E. lawesi, " A few black hairs are scattered through the spines 

 and on the sides of the body," and Dr. Gestro of the specimen in 

 Genoa, " Entre les epines il y a des poiles tres-visibles." 



Thus the hair-covering between the spines seems to be less scanty 

 in E. lawesi than in E. acanthion. 



Further, the length of the bare portion of the snout in E. acanthion 

 (in consequence of the shortness of the snout itself) is never two 

 inches, as in the type specimen of E. lawesi, but even in the largest 

 specimens but a little more than one inch and a half. 



4. Description d^un nouveau Rongeur du genre Ccelogeays. 

 Par Jean Stolzmann. 



[Received January 16, 1885.] 



Pendant mon dernier voyage dans la republique de I'Equadeur on 

 m'a souvent parle d'uu quadrupede, nomme par les indigenes " Sacha- 

 cui," ^ tandis que le paca {Cceloyenys paca) y est connu sous le nora 

 de " Gualilla." De la description, donnee par les habitants du pays, 

 je supposais que 1' animal en question pouvait appartenir au meme 

 genre de Cmlogenys. Mais comme ce dernier habite les contrees 

 tres chaudes et se tient toujours au voisinage des eaus, tandis que 

 le " Sacha-cui " est propre a une haute region, renfermee entre 

 6000 et 10,000 pieds au dessus du niveau de la mer, frequeutant 

 souvent les lieux tres eloignes des couiants d'eau, je supposais qu'il 

 s'agit d'un quadrupede inconnu, et apres m'en avoir procure une 

 paire d'individus adultes, j'ai reconnu que j'avais raison. Je donne 

 done sa description, en lui proposant le nom du 



CoELOGENYS TACZANOWSKII. 



C fusco-brunneus, subtus albicans, lateribus quaiernis seriebus 



^ " Sacha" (indien)=la foret ; " ctci" (iudien)— eavia. 

 Proc. ZooL. Soc— 1885, No. XI. 11 



