ALLEN: mammalia: octodontid^. 35 



599, part ; only the references to Bennett and Waterhouse. — Thomas, 

 P. Z. S., 1898, 211. Tombo Point, on the coast 60 miles south of 

 mouth of Rio Chubut. — Lahille, Congr. Cien. Lat. Amer., Ill, 1899, 

 190. 

 Ctenomys neglectus Nehring, Zoolog. Anz., XXIII, Oct. 8, 1900, 535, 

 fig. I, skull. Based on a weathered skull from Patagonia. 

 Waterhouse's description and measurements of the type (/. c.) and then 

 only known specimen of this species, being more concise and explicit than 

 Bennett's, are here presented : 



"General tint of the fur ashy grey, faintly suffused with yellow, and on the 



back brownish ; abdomen pale ochreous yellow ; tail very pale brown : the 



fur is moderately long, very soft, and of a deep slate grey colour at the root. 



"Inhabits Port Gregory [=Cape Gregory of Bennett and of modern 



mapsj, Strait of Magalhaen. 



Inches. Lines. [mm.] 



" Length from tip of nose to root of tail .... 8 o [203 ] 



Length of tail 2 6 [63. 5] 



Length of fore foot and nails \o\ [22. i] 



Length of longest nail 2\ [ 6.7] 



Length of hind foot and nails i 3^^ [33 ] " 



A nearly complete skull, and several others more or less incomplete 

 (all weathered skulls — Nos. 234 10-234 13, U. S. Nat. Mus.), collected by 

 Mr. Charles H. Townsend near Punta Arenas, Patagonia, during the 

 cruise of the Albatross in 1887- 1888, undoubtedly represent this species, 

 to which I also refer a single specimen (No. 17444, Am. Mus.), skin and 

 skull, and an additional younger skull (No. 17445, Am. Mus.) collected 

 by Mr. Barnum Brown " 30 miles south of the Port of Santa Cruz, on the 

 coast" of Patagonia, and by him presented to the American Museum of 

 Natural History. They agree well with Bennett's and Waterhouse's de- 

 scriptions, and the younger skull agrees with their figure of the skull of the 

 type, even in size. The other, a much older skull, is considerably larger. 

 Mr. Brown's specimens came from about 150 miles north of the type 

 locality and appear to be strictly referable to this species, which differs 

 from the form inhabiting the Cordilleras at the head of the Rio Chico de 

 Santa Cruz, presently to be described, in its very much paler colors, both 

 above and below, but appears not to be distinguishable in cranial charac- 

 ters. It is a pale form, like the later described Ctenomys fitegmus Philippi 

 from Tierra del Fuego. 



