938 JOURNAL, BOMBAY NATURAL HIST. SOCIETY, Vol. XXVI. 



sotitli-westpru corner, in Central Persia, on the Korud Range, 0. r. 

 vizier, and now this very buffy fo)-m from the south-eastern corner 

 Kelat and probabl}^ Qaetta, completes the set. 



The series available however is far too small to make it possible 

 to work out the interrelationships of the different forms, especially 

 as the changes of pelage render so many of the specimens not 

 properly comparable with the rest. It is for this reason that 

 I am still in doubt whether specimens from Mastung, 8. W. of 

 Quetta and Ziarat, N. E. of same place, are or are not certainl}^ 

 referable to 0. r. vulhirna. 



B—TWO NEW SPECIES OF CALOMYSCUS. 



RY Oldfield Thomas, f.r.r. 



Amono- the fine collection of Mammals from Baluchistan con- 

 tributed to the Survey hj Col. J. E. B. Hotson, there are no less 

 than 14 examples referable to the rare form Galomyscus, of which 

 only one single specimen has hitherto been recorded, and which 

 is remarkable for its close relationship to certain American Murida3, 

 and wide distinction from all Old World forms except Cricetus and 

 its allies. That specimen, the type of Galomyscus hailwardi, was 

 captured in the mountains of Western Persia, so that the dis- 

 covery of the same group in Baluchistan indicates that the genus 

 has an unexpectedly wide range. 



With two exceptions I can add but little to the original descrip- 

 tion of the genus, the type of hailtrarcU having been such a good 

 specimen that most characters were observable upon it. More 

 unworn teeth among the present specimens confii-m the surpris- 

 ino-ly close alliance of Galomyscus with the American Peromyscus, 

 or at least with such members of that genus as have no interme- 

 diate cross ridges on their molars. Indeed I might even have thought 

 it necessary to sjnaonymize Galomyscus with Peromi/scus had we 

 not now found that there is a constant difference between the two 

 in the number of molar roots. In Peromyscus there appears to be 

 always the specialised reduction in number resulting in only two 

 roots being visible on the inner aspect of m' and one in m", while 

 in Galomyscus the condition is the more primitive one of three 

 being visible in m^ and two in nr. 



The mammary formula appears to be 1 — 2 = G, the number 

 almost invariably present in Peromyscus. 



As was originally said to be probable, the peculiar white tuft 

 half way along the tail of the type of hailirardi does not occur in 

 other specimens, and is no doubt abnormal. 



