322 F. H. Stkwart : Aquatic animals from Tibet. [Voi,. II, 



lyength . . 

 Maximum breadth 



V 1 7 / 



•14 mm. 

 •• "07 ,, 

 Locality. — Te-ring Gompa, 14,000 ft. April to September. 



This form closely resembles N. scapha, Gosse. It differs from 

 it in (i) the more marked difference in size between the central 

 and sublateral spines of the occipital edge ; (2) in the greater" depth 

 of the incisura of the pectoral edge; (3) there are 20 — 24 dorsal 

 striae instead of 11. 



Fig. 6. 



GASTROTRICHA. 



18. Lepidoderma squammatum, F. Dujardin. 



Only one specimen was preserved. It corresponds, however, 

 so closely with the description of P. squammatum by Zelenka, that 

 there appears to be no doubt about the diagnosis. The transverse 

 rings separating the ciliary fields in the anterior portion of the body 

 and the scales in the same position in the posterior portion can be 

 made out, although the specimen is mounted on its side. 



i Measurements. 



Length . . . . . . • • '17 oim. 



Maximum dorso-ventral measurement of head '026 ,, 



Minimum ,, „ ,, neck -026 ,, 



lycngth of oesophagus . . . . . . -05 ,, 



,, ,, terminal spur .. ,. •016 ,, 



The latter measurement is the only one which differs appreci- 

 ably from the corresponding measurement given by Zelenka, viz.^ 



