320 JOURNAL, BOMBAY NATVRAL HIST. SOCIETY, Vol. XXVII. 



(29) Mus MUSCULUS, Linn. 

 The House Mouse. 

 (Synonymy in No. 1.) 

 Chahabar, J 1, $ 1 ; Pasni, ^ 1. 

 Both localities are on the coast and these specimens no doubt represent 

 imported stock. They are not quite the same as European House-mice bvit 

 until the many shades of change from the Indian frontier westward have 

 been studied as a whole it is most undesirable to multiply named 

 subspecies, 



(SO) Mus BAOXRiANUS, Blyth. 



The Kandahar House Mouse. 



(Synonymy in No. 24.) 



Panjgur, 6 79, $ 56 ; Ispihan, J 2, $ 1 ; Sib, $ 2 ;Mand, S 2, 

 5 1 ; Chib, d 3, $ 1 ; Turbat, d 3, ? 1 ; Chahabar, c? 8, 

 5 7 ; Johran Kahur, S 1 ; Khojdar, cJ 1, § 1 ; Manguli, J I, 

 $ 4 ; Sourab, c? 4, $ 4; Mastung, d 6, § 5 ; Kalatak, (S 1, 

 ? 1 ; Shakarak, $ 1. 



The most northerly specimens (from Mastung) have been compared with 

 the type of bactrianus, Blyth, the type locality of which is Kandahar and 

 I can discover nothing to consistently differentiate these Mastung speci- 

 mens from the rest. The name has already been used in these reports 

 for specimens from Sind but these are clearly separable on size. Blyth has 

 described a species gerbillinus from Find Dadan Khan which might very 

 well be the Sind species. Unfortunately the Museum has no representa- 

 tive specimens from the Jhelum Valley, or indeed from the Punjab. I 

 propose therefore to use the name gerbillinus for the Sind specimens (in 

 substitution for bactrianus) iintil something is known of the Punjab forms. 



(31) ACOMYS DIMIDIATXTS, Rupp. 



The Sinai Spiny Mouse. 

 1826. Mus dimidiatus, Buppell. Atlas, p. 37. 



Chahabar, J 4, 5 1 ; Karochi Durk, 5 1. 

 These specimens differ from the solitary specimen taken by Waston at 

 Laki near Sohwah. They seem to resemble the Sinai form but it is a 

 difficult group and more material especially of our Sind form is required 

 to make a reliable identification possible, I have temporarily ranked it 

 as dimidiatus. 



(32) CALOMYSctrs BALUCHI, Thos. 



The Baluch Vesper Mouse. 

 19. Calomyscus baluchi, Thomas. J. B. N. H. S. XXVI., p. 939, 



Harboi, J 2, $ 5 ; Kelat, d 5, $ 2. 



(33) Calomyscus hotsoni, Thos. 



Hotson^s Vesper Mouse. 



19. Calomyscus hotsoni, Thomas, J, B, N. H. S. XXVI,, p. 939. 

 Gwambauk, (5 4, $ 3. 



The isolated appearance of this genus so closely related to the American 

 genus Peromyscus, is most startling, At Mr. Thomas's suggestion I have 

 adopted for it the name Vesper-Mouse which is that used for its representa- 

 tive in the U. S. A. 



