igoS.] Records of the Indian Museum. 323 



•022 mm. As my specimen, however, is mounted on its side, there 

 is doubtless some foreshortening due to the lateral curve of the 

 spur. 



Habitat. — Te-ring Gompa, 14,000 feet. 17th May, 1907. 



These animals were by no means of frequent occurrence. I 

 believe that I did not find more than three or four specimens in 

 six months' work. 



Lepidoderma squammatuni has been recorded from Germany, 

 France, England, Austria and North America (Zelenka). 



Technique. — For the two groups of Rotifers and Gastrotricha 

 the only form of technique employed was that of Rousselet — cocaine, 

 osmic acid and formalin {Journ. Queckett Micr. Cluh^ vol. v, 

 p. i), asphalt being used as a cement. This method gave excellent 

 results for observation within three or four months, and about 

 thirty per cent, of the specimens were found to be in very fair 

 condition after fifteen months, in some cases in such a good state of 

 preservation as to repay examination with a yV-inch oil immersion 

 lens. When it is considered that the slides had made a road 

 journey of two hundred miles, and had endured extremes of climate 

 from the cold of the Tibetan passes in mid-winter to the full heat 

 of the hot weather in Calcutta, the method may be regarded as 

 having been tested under somewhat adverse conditions, and to 

 have come well out of the test. 



ENTOMOSTRACA ET HYDRACHNIDAE E TIBET. 



[Cum Figuris 9 in Textu.] 



Prof. E. Dad ay de Dees. 



lUustr. Dom. F. H. Stewart anno 1907 in Tibet ex aliquot 

 localitatibus inter alia etiam materiam planctonicam collegii 

 quam lUustr. Dom. A^ Annandale, Superintendens Musei Indian 

 Historiae Naturalis studiendi causa Entomostracorum Hydrachni- 

 darumque ad me misit. Commissionem hanc honorabilem, literatu- 

 ra datis de Entomostracis Hydrachnidisque in Tibet occurentibus 

 hucusque exceptis ab Illustr. D. G. 0. Sars publicatis carente, 

 libenter accepi resultatemque studii mei in subsequentibus breviter 

 conscribere necessarium esse putavi. Notamdum est, collectionem 

 Dom. F. H. Stewarti in 17 vitris et e 4 localitatibus species 21 

 infra partim enumeratas, partim descriptas continere. 



Localitates materiae planctonicae examinatae sunt sequentes : — 



I. Mang-tsa, altitudine 44i9"5 mtr. a superficie maris; anno 

 1907, 2 Julii — 2 vitra. 



