418 bulletin: museum of comparative zoology. 



Dimensions. 



Tip of snout to vent 97 mm. 



Tip of snout to posterior end of mandibular bone 36 " 



Greatest width of head 43 " 



Fore leg to tip of longest finger 52 . 5 " 



Hind leg to tip of longest toe 135 " 



Remarks. Mention has already been made of the probable evolu- 

 tion of T. culcus from T. aemaricus. Garman is the only herpetolo- 

 gist who has ever published upon the peculiar subaqueous existence 

 of T. cideus. In the original description he says : — 



"These animals are very abundant in the extensive beds of weeds 

 which occur on the bottom of Lake Titicaca. They feed on the mol- 

 luscs, Crustacea, worms, etc., and are fed upon by birds and fishes. 

 Marmora tus [= aemaricus] was found in little creeks and marshy places, 

 in situations indicating habits similar to the common Ranpe; during 

 the two months of the observations culeus was only to be fovmd in the 

 lake, crawling lazily about among the weeds or half hidden by them, 

 watching for prey. The latter was the only one found in the vicinity; 

 the former was secured on the summit and the western slope. These 

 animals are able to remain vmder for great lengths of time without com- 

 ing up for air; hours of watching in clear water where many could be 

 seen, failed to detect any approaching the surface. It is possible that 

 they are more lively at night, when their enemies are less active. 

 Numbers were brought up in the trawl at more than four miles from 

 the shore. None were found on the land. The natives were positive 

 they never left the water. All stages of the animal are represented 

 by the specimens in the collection." 



Mr. Garman in conversation, adds the following facts : — the species 

 is far more abundant in the southern than in the northern end of the 

 Lake. The large specimens obtained were mostly caught near Guaqui 

 or Copacabana. None were observed or dredged in the great northern 

 bay north of the Capachica Peninsula. Neither Garman nor the 

 senior author, who visited Lake Titicaca in 1909 found that the 

 Indians used culeus for food. This is a common custom at Lake 

 Junin with Batrachophrynus micro phthalmus, whose habits are very 

 similar to those of the Titicaca frog. 



The following material in addition to the type remains in the Mu- 

 seum of Comparative Zoology, of Garman's collecting, after a consider- 

 able number of specimens have been distributed to other institutions. 



