oniKXTAL coI-MOMFioI.A. 81 



A. — Piilfearc'tio, Species. 



Mntomobrya crassa, 8p. ii. 

 Isotoma siva, sp. n. 

 7'omoceri/,s vulgaris Tullb. 

 iSinella montana, sp. n. 

 tSeira fricjida, sp. n. 



B. — Oriental Species. 



Xenylla ohscitra, sp. n. 



Achorutes armatus Nicolet. 



Pseudacliorutes anomalus, sp. n. 



Neanura corallina, sp. n. 



N. intermedia, sp. n. 



y. 2nidibunda, sp. n. 



Isotoma nigropuiictata, sp. ii. 



Heteromuriciis cercifer, gen. et sp. n. 



Isotoniurus palustris Miill. 



jLepidoci/rtus rohustus, .sp. ii. 



Entomnbrya kali, sp. n. 



E. kali var. lutea, nov. 



ISeira brahma, sp. n. 



Pseadosira indra, sp. n. 



Dicraiiocentroides fascicidatus, gen. et sp. n. 



Cremastocephalus montanus, sp. n. 



C. indicits, sp. n. 



Paronella borneri, sp. n. 



7''. travancm'ica, sp. n. 



/". gracilis, sp. n. 



Z''. phanolepis, sp. n, 



/*. ijisiynis, sp. n. 



Idiomerus iJallidns, gen. et sp. n. 



Cyphoderus simulans, sp. n. 



Psemlocyphoderus annandaUi, gen. et sp. n. 



Sminthurides appendiculatus, sp. n. 



The fact that so large a proportion of tlie species are new is 

 scarcely remarkable, owing to the great diversities of climate and 

 soil found in the various areas from which the specimens were 

 obtained ; vide text-fig. 14, p. 82. 



The limits of the northern boundary of the Oriental zoo-o-eo- 

 graphical region are difficult to define owing to the fact that 

 members ()f the Oriental fauna penetrate, in places, for long dis- 

 tances up into the hot confined valleys of the Himalayas ; while, 

 on the other hand, the Pala?arctic fauna descends the southeri? 

 slopes of that range to within the limits of forest growth. Ai 

 Blanford * remai'ks, above the limit of forests the fauna is purel) 

 Palajarctic, all the Oriental types having disappeared. The forest 



* "Tlie Distribution of Vertelirate Animals in India, Ceylon, and Burma." 

 Phil. Trans. Roy. Soc. vol. 191, 1901, p. 347. 



Proc. Zool. Soc— 1912, No. VI. 6 



