RESULTS FROM THE MAMMAL SURVEY. 239 



volmiteered for service at the front, and received commissions. 

 Capt. Macmillan was wounded while leading his company into 

 action and died of his wounds on the 9th May 1915. His death will 

 be a great loss to the Survey. 



Tamiops macclellandii, Horsf. 



19 specimens referable to T. macclellandii were obtained during 

 the Chindwin expedition. 



Of these, 16, collected down the East bank of the river from 

 Hkamti to Homalin, may be provisionally referred to true macclel- 

 landii, while the other three, from the Chin Hills, appear to represent 

 T. m. maniinirensis, Bonh. 



Further study of both forms however is needed, both with regard 

 to their geographical range and seasonal variation, on which latter 

 point material is sadly lacking. 



Persons living in the areas where these beautiful little squirrels 

 are found would do a great service by collecting series of 

 them all round the year — say, two everj?- month — so that a 

 thoroughly sound idea could be gained as to the seasonal changes 

 they undergo. 



B. — Notes on the genus CBEnmuif^. 

 By Oldfield Thomas. 



(Published by permission of the '.Crustees of the British 31'useum.') 



The Rock-rats of the genus Cremnomys afford a striking instance 

 of the increase of our knowledge and material due to the work of 

 the Bombay Survey. None of these Rock-rats had ever been 

 obtained at all by any Indian naturalist until the siu'vey collector 

 Mr. Crump got a small series in Cutch in 1911, on which 

 Mr. Wroughton described the genus. 



Now, there are available for examination no less than 238 

 specimens, representing, each with fair series, eight localities, from 

 Cutch and Kathiawar in the North-west, Hazaribagh in the North- 

 east, to Bellary and Seringapatam in the South, a range which 

 makes it most astonishing that no Cremnomys had been found 

 before 1911. The explanation is no doubt that these rats can only 

 be obtained by systematic trapping, and so do not fall into the 

 hands of the casual naturalist, who trusts to his gun and to natives 

 for what mammals he gets. Cremnomys cannot be dug out, owing 

 to the rocky nature of their habitat and so are never captured by 

 natives. 



Inhabiting as they do groups of rocky hills more or less isolated 

 from each other, it is natural to find a certain amount of local 

 difference between the specimens from different localities, and I 

 have therefore now divided the series into three species, and these 



