OBSERVATIONS ON TYPHLOMOLGE RATHBUNI. 8 1 



beginning was white with a bluish, mother-of-pearl gleam, had 

 darkened somewhat. 



It should be pointed out here that slow reaction to food as 

 exhibited by the Typhlomolge'*- is noteworthy in regard to certain 

 findings of Miss E. T. Emmerson, who claims, upon anatomical 

 reasons, a close relationship between Typhlotnolge and the larvae 

 of Eurycea rubra. We are keeping a large number of such 

 larvae in the laboratory and contrary to my experience with the 

 larvae of Ambystoma and other salamander larvae, these larvae 

 react very slowly to food. In fact, it is impossible to make them 

 eat every day aside from the fact that most of the individuals of 

 this species will eat only at night. 



EZELL'S CAVE. 



Ezell's Cave was opened up several years before the San 

 Marcos Well was drilled. The entrance to the cave is located 

 on the southwest slope of the San Marcos Hill (see map, Fig. 2), 

 w r here it slopes down to the valley of Purgatory Creek about 2 

 miles W.S.W. of the San Marcos Court House, and not far 

 from a little ravine, the bed of the dry City Boundary Creek, a 

 tributary to Purgatory Creek. This location of Ezell's Cave indi- 

 cates that it belongs to the Purgatory Creek System, the river 

 found in it probably being the subterranean course of the City 

 Boundary Creek. 



Ezell's Cave distinctly exhibits the aspect of a large crack in 

 the strata of the hill, brought about by dislocation of the strata 

 towards the Purgatory Creek Valley. The entrance to the cave 

 (approximately 6/0 feet above sea level) is part of a 62 ft. 

 slit in the surface (Fig. 5), which for the most part is closed 

 up by large rocks and runs from N.N.W. to S.S.E., that being 

 the direction of the long axis of all the various parts of the cave. 

 As the diagrammatic cross and longitudinal sections (Fig. 6 and 

 7) indicate, the entire slit so far as accessible is divided into two 

 compartments by means of the rock masses which were thrown 

 down during the process of dislocation and following corrosion. 



i Normann, who kept a specimen of Typhlomolge in captivity, also reports 

 great difficulty in making the animal eat. 



