1907.] 



Dr. Hossack : The Rats of Calcutta. 



25 



Darjeeling Mus rattus var. nitidus. 

 Principal skull measurements. 



No. 



Sex. 



G.L. 



BX. 



G.B. 



N.L. 



lo. B. 



■4-> 



s 1-1 







Zg. PI. 



•3 



CO CL) 



Ù 







Ù 



ci 



rt 

 i 



D^ 



rt 



S 





pq 



^ cJ 



c 



4 



L. J. Cor. 

 to Angle. 



1 



rT 



44 

 10) 



38 

 86-35 



21 

 +7-72 



17*5 

 39-77 



6 

 13-63 



17 



38-63 



5*5 

 12-5 



22-5 



50-13 



8-5 

 19-31 



3 



6-81 



12-5 



28-45 



7 

 15-8 



2 

 4-54 



29*5 

 67-04 



13 

 29-54 



5 



S 



45 



38 



22 



18-5 



6-5 



17 



5-5 



22-5 



8-5 



3-5 



13 



8 



2 



30 



14-5 







100 



84-4 



48-8 



41-1 



14-4 



37-7 



12-2 



50-0 



18-8 



7-7 



28-8 



17-7 



4-4 



66-6 



32-2 



4 



& 



45-5 

 100 



385 

 84-61 



215 

 47-2 



17 

 37-3 



6 

 13-1 



17 

 37-3 



5-5 

 12-0 



22 



48-7 



8 

 17-5 



35 



7-6 



13 



28-5 



7*5 

 16-4 



2 

 4-3 



30-5 

 670 



14 

 30-7 



Total 



figures 



1345 



114-5 



645 



530 



i8-5 



5'i 



.6-5 



67-0 



25 



10 



385 



22-5 



6 



90-0 



41-5 



Ave rage 

































figures 

 1 



44-8 



38-1 



215 



17-6 



6-1 



17 



5-5 



233 



8-3 



33 



I -8 



7-5 



2 



30 



I3-« 



1 

 Average per- 

 centage . . 





84-8 



47-2 



39-3 



13-6 



37-9 



12-2 



49-7 



18-5 



7-3 



28-6 



16-7 



4-4 



67-0 



30-8 



MUS DKCUMANUS. 



This description is based on full measurements in the flesh of 75 specimens, many 

 of them immature, and a cursory examination of a very large series of some hundreds 

 at least, all trapped in Calcutta. 



General Characters. — It is a very large, not unhandsome, thickly-furred rat, with 

 large, heavy, flesh-coloured feet, a tail averaging 90 per cent, of the body-length, white 

 or light coloured below. The pads are large, prominent, and the middle ones are cor- 

 diform. Ears and eyes are small. The head is long, with broad heavy muzzle and 

 cheeks very full. The tail is heavy and uniformly tapered. 



Fur. — The fur is composed of the usual three elements : — 



1. Ivong, black hairs found all over the back, projecting above the general surface 

 of the fur. These only average 2-5 cm. long, and are different from the long, stout, 

 prominent piles of Nesokia, which are nearly twice as long. 



2. Stout hairs about 1-25 cm. These vary much in colour and show every 

 gradation of colour from pale ochre or burnt-sienna to brown and blackish-brown. 

 Some are black or brown with yellow tips, while some are yellow with brown or black 

 tips. On the underparts these hairs are mainly white. 



3. Thick underfur composed of lanuginous hairs ■5-75 cm. long, mostly grey, 

 but some pale ochre or very pale brown. These latter may have a grey base. They 

 are very much finer than in Nesokia bengalensis. 



4 



