3i8 F. H. Stewart: Aquatic animals from Tibet. [Voi.. II, 



6. Copeus lahiatus, Gosse. 

 Locality.— Ch.d,n%-\o, 13,100 ft. August. 



7, Proales gibba, Ehrenberg. 



The measurements of this Tibetan form are slightly larger than 

 those given by Gosse, i.e. tW in length as compared with 3^0" — 



2 00 • 



Locality. — Chang-lo, 13,100 ft., in slowly flowing water among 

 algae. June. 



8, Diglena catellina, Ehrenberg. 



Locality. — Te-ring Gompa, 14,000 ft. 



Fig. 3. 



PLOIMA LORICATA. 



Fam. Rattuwd^. 



9. Mastigocerca auchinleckii , sp. nov. (fig. 3). 



Specific characters. — Body fusiform. Head truncate. Occipital 

 margin of lorica armed with two unequal spines of which the longer 



