ARTICLE II 



REPORT ON TRICLAD TURBELLARIA FROM INDIAN TIBET 



By Libbie II. IIyman 

 (Received November 10, 1933) 



The planarian material collected by the Yale North India Expedition was turned over to 

 me by Mr. G. E. Hutchinson for examination. It consisted of fourteen vials of specimens in 

 alcohol. These were run up into oil of wintergreen and examined with low power. It was 

 then seen that the contents of thirteen of the vials are all (presumably) of one species, a 

 species of Polycelis, while the fourteenth vial contains specimens which are probably to be 

 assigned to the genus Euplanaria. Fortunately some of the Polycelis are sexually mature and 

 it has therefore been possible to furnish a diagnostic description. The specimens of the 

 second species are unfortunately all asexual and consequently cannot be placed generically 

 with any certainty. All of the material came from Kashmir and Indian Tibet. The sta- 

 tions labelled K64-K71 are located to the northeast of Srinagar, Kashmir; those marked 

 K 74-K 83 and L up to number 25 are collecting sites in Indian Tibet on the road between 

 Srinagar and Leh and in the Indus valley above Leh ; and tlie remainder of the numbers 

 under L are situated in Indian Tibet north and east of the Ladak range. The following 

 remarks give the data found on the labels in the vials together with my own notes from 

 examination of the cleared specimens. 



K 64. Gund, rest house, 2080 meters, under stones in a very small stream, temperature 

 9.4°C., May 17th, 1932. This vial contains three specimens which constitute the second 

 species mentioned above whose external appearance suggests the genus Euplanaria. 



K 66. Small stream with very steep slope, about three miles west of Sonamarg, 2440 

 meters, temperature 7°C., May 18th, 1932. This vial contains eight good-sized specimens of 

 Polycelis, none of which appear to have sex organs. 



K 71. Stream west of Sonamarg, 2590 meters, temperature 7.0 C., pH. 7.6, May 19th, 

 1932. Thirteen specimens of Polycelis, mostly rather small. Four of the largest were sec- 

 tioned but proved to be devoid of sex organs. 



K 74. Small stream, temperature 7.3°C., pH. 7.5, mossy, 50 cm. wide, Matayan, 3170 

 meters, May 20th, 1932. Eight specimens of Polycelis. 



K 76. Small stream, temperature 19.0^C., about one mile west of Dras, 3080 meters. 

 May 21st, 1932. Of the ten,specimens of Polycelis foiind in this vial two were removed and 

 sectioned but proved asexual. 



K77. Stream, Dras, temperature 21.0-22.0 C, 3091 meters. May 21st, 1932. Nine 

 specimens of Polycelis, five adult and four young ones, all asexual. 



K 78. Karbu between Dras and Kargil, spring, temperature 8'C., pH. 7.5, 2819 meters. 

 May 22nd, 1932. This vial contained four specimens of Polycelis of which two were seen to 

 be sexually mature and have been sectioned. 



K83. Spring, Kargil, temperature 10.2° C., 2679 meters, May 24th, 1932. Two speci- 

 mens of Polycelis, not sexual. 



Mem. Conn. Acad., Vol. X, Art. II. September, 1934. 



