422 bulletin: museum of comparative zoology. 



village of Acancocha near Vitoc. At our request Mr. John M. 

 Boutwell, a mining geologist at the Cerro de Pasco mines, kindly 

 made a special effort to secure a series of this little-known species. 

 He procured two lots of beautifully prepared examples from near 

 Tarma and Palca, two stations in the Oroya district and practically 

 topotypes. 



Telmatobius montanus Philippi. 



Telmatobius montanus Philippi, Supl. Batr. Chilenos Santiago, 1902, p. 47. 

 (?)Telmatobius aemaricus Werner, Zool. jahrb. Suppl., 1897, 4, p. 263. 

 (?) Telmatobius marmoratus Werner, Zool. jahrb. Suppl., 1897, 4, p. 263. 



Diagnosis (extracted from original description). Indistinguishable from 

 T. laevis except for the narrower head and the toes which are fully webbed. 



Habitat. A lake in the high Andes of the Province of Santiago, 

 Chile. 



Remarks. Tdmatohius montanus is evidently the water-form of 

 T. laevis. It bears the same relation to T. laevis which T. culeus bears 

 to T. aemaricus. Philippi in describing T. laevis states that it comes 

 from a pasture, while he states clearly that T. montanus was found in a 

 lake. If Philippi's descriptions may be relied upon, it is very prob- 

 able that the same evolution with change of structure has taken place 

 in Chile as well as in the Andes of southern Peru, where there has- 

 been a change from a land to a completely aquatic mode of life. 



Telmatobius laevis Philippii. 

 Telmatobius laevis Philippi, Supl. Batr. Chilenos, Santiago, 1902, p. 43. 



Diagnosis (extracted from original description). No vomerine teeth; 

 choanae very large. Nostrils nearer the eye than the tip of the snout. Tym- 

 panum hidden, covered by undifferentiated skin. Toes one fourth webbed. 

 Skin entirely smooth, no glands on any part of the body. Color above black, 

 no trace of marldngs; ventral surface light grey, similarly without markings, 

 fingers somewhat lighter in color, especially at the point. 



Habitat. Chile; range probably restricted to some of the pasture- 

 lands of the Andes. Philippi {Loc. cit., p. 44) states that the type- 

 specimens come from "Potrero," in other words from a pasture. 



