572 RODENTIA 



DYROMYS ROBUSTUS Miller. 



1910. Dyromys lubiistus Miller, Ann. and Mag. Nat. Hist., 8th ser., vi, 

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



Type locality. — Ru.stschuk, Bulgaria. 



Geographical dixtrihution. — Known from the tyj^e locality only. 



Diagnosis. — Like Dyromys nitediila but skull broader and 

 more robust, with relatively shorter rostrum and mvich enlarged 

 auditory bulke. 



External cliaracters and colour. — Not appreciably different 

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



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

 the largest specimens of Dyromys nitedida, but conspicuously 

 broader and more robust ; brain-case relatively shorter and 

 broader^ its width above zygomatic roots nearly equal to distance 

 from posterior border of iiaterparietal 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 bulla?, the brain-case appears deeper than in the related 

 species ; auditory bullae of the same form as in D. nitedida, 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. nitedida ; relative size of upper 

 premolar about as in D. n. wingei. 



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

 body, 95 ; tail, 87 ; hind foot, 22 ; ear from meatus, 15. For 

 cranial measurements see Table, p. 571. 



Specimen examined. — The type. 



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



{Type of species.) 



Genus GLIS Brisson. 



1762. Glis Brisson, Eegn. Anim. in Classis ix distrib., 2nd ed., p. 13(G7i6). 

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



Sciurus glis Linnasus). 

 1843. Myoxiis Wagner, Abhandl. kais Bayer. Ak. Wissensch., Miinchen, 



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

 1857. Glis Blasius, Siiugethiere Deutschlands, p. 288 (Sub-genus of 



Myoxus). ' 

 1890. Myoxus Reuvens, Die ]\Iyoxidae oder Schlaefer, p. 56 (Sub-genus of 



Myoxus). 

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

 lEOO. Elius Schulze, Zeitschr. fiir Naturwiss., Stuttgart, lxxiii, p. 200 



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



Type species. — Glis Brisson = Sciurus glis Linnaeus. 

 Geographical distribution. — Central and southern Europe from 



