210 Mr. O. Thomas on small Mammals 
just reaching the level of the front edge of m', while in 
N. valdivianus they extend to the level of the back of the 
first lamina of that tooth. 
Dimensions of the type (measured in the flesh) :— 
Head and body 104 mm.; tail 44; hind foot 20; ear 12. 
Skull: greatest length 28; condylo-incisive length 25°5 ; 
zy gomatic breadth 13°7 ; nasals 10; interorbital breadth 5:2 ; 
breadth of brain-case 12°8; palatilar length 11°4; palatal 
foramina 6 ; postforaminal palate 4°1; upper molar series 3°5. 
Hab. as above. 
Type. Old male. B.M. no. 18. 12. 2. 37. Original num- 
ber 194. Collected 30th April, 1918. 
This series of the long-clawed mole-like Murines of the 
south is perhaps the most interesting part of Sr. Budin’s 
collection, and forms a very valuable accession to the 
National Museum. 
16. Ctenomys haigt, sp. n. 
gd. 179, 180, 181, 184, 189; 9. 174,185, 186, 187; 190: 
Maiten, W. Chubut. 700 m. 
Allied to ©. colburn?, All., but smaller, with smaller 
bullee. 
Size medium. Fur soft, fine and silky, hairs of back 
about 11-12 mm. in length. General colour of upper surface 
finely ticked greyish brown, near “ drab,” without median 
darker marking on rump or crown, the top of the nose only 
dark brown. Sides clearer grey, and the lower flanks rather 
abruptly and prominently buffy (“light buff”) in continua- 
tion with the buffy wash on the hairs of the under surface. 
Forearms also prominently pale buffy both externally and 
internally ; hind feet dull whitish. Tail grey on sides, 
blackish above and terminally below, but this, as usual, is 
variable in extent. 
Skull, as compared with that of C. colburnt as figured by 
Allen *, similar in shape, but smaller and with decidedly 
smaller bullae, which do not project backwards beyond the 
level of the supraoccipital. Interparietal quite united with 
parietals in all the specimens, the line of junction generally 
marked by some discoloration. Bulle of average size, 
markedly less swollen than those figured in the male 
C. colburni. 
Dimensions of the type:— 
Head and body 165 mm.; tail 70 ; hind foot 28. 
Skull: greatest length in middle line 40:2; condylo- 
incisive length 38°7 ; zygomatic breadth 23:5; nasals 14°7 ; 
* Mamm. §. Pat. pl. vill. fig. 4. 
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