572 RODENTIA 



DYROMYS ROBUSTUS Miller. 



1910. Dijyomijs rohusiiis Miller, Ann. and Mag. Nat. Hist., Stb ser., vi, 

 p. 459, November, 1910. Type in British Museum. 



TjjjM- locaJifij. — Rustschuk, Bulgaria. 



Gev(jrapltical dlxiribntion. — Known from the type locality only. 



Diagnosis. — Like D;/romys nitedula but skull broader and 

 more robust, with relatively shorter ro.struin and much enlarged 

 auditory bulla;. 



External characters and colour. — Not appreciably diflerent 

 from those of D. nitedula (no skins examined). 



Shdl and teeth. — Skull of essentially the same length as in 

 the largest specimens of Dyromi/s nitedula, Imt conspicuously 

 broader and more robust ; brain-case relatively shorter and 

 broaderj its width above zygomatic roots nearly equal to distance 

 from posterior border of interparietal to narrowest portion of 

 interorbital constriction, its posterior outline appearing more 

 squarely truncate when viewed from above, and wider and lower 

 when viewed from behind ; in lateral aspect, owing to the 

 enlarged bulhe, the brain-case appears deeper than in the related 

 species ; auditory bulke of the same form as in D. nitedula, but 

 so enlarged that their length from paroccipital process is nearly 

 equal to distance from front of bulla to infraorbital foramen ; 

 mandible heavy but with no special peculiarities of form. Teeth 

 with enamel pattern as in D. nitedula ; relative size of upper 

 premolar about as in D. n. iinncjei. 



Measurements. — Type (adult female in alcohol) : head and 

 body, 95 ; tail, S7 ; hind foot, 22 ; ear from meatus, 15. For 

 cranial measurements see Table, p. 571. 



Specimen crcrniincd .—The type. 



9 al. Rustschuk, Bulgaria. K. Andersen (c). 11. 10. 8. 1. 



{Type of species.) 



Genus GLIS ISrisson. 



1762. Glis Brissou, Regn. Anim. in Classis ix distrib., 2nd cd., p. 13(6'/)*). 

 1780. Myoxus Zimmermanu, Geogr. Gesch., ii, p. 351 (Type by tautonymy 



Sciurus glis Linnseus). 

 1843. Myoxus Wagner, Abhandl. kais Bayer. Ak. Wissensch., Miincben, 



Math.-Phys. Classe in, p. 185 (Sub-genus of Myoxus). 

 1857. Glis Blasius, Saugethiere Dcutschlands, p. 288 (Sub-genus of 



Myoxus). 

 1890. Myoxus Reuvens, Die Myoxidae oder Schlaefcr, p. 56 (Sub-genus of 



Mjjoxus). 

 1895. Glis Merriam, Science, N.S., i, p. 376, April 5, 1895 (Genus). 

 lEOO. EUks Schulze, Zeitschr. fiir Natnrwiss., Stuttgart, Lxxiii, p. 200 



(Sub-genus of Myoxus) part, included glis and nitedula. 



Type species. — Glis Brisson = Sciurus glis Linna?us. 

 Geographical distribution. — Central and southern Europe from 



