154 Christmas Island. 



species of Scorpion, three species of Spiders, three of Centipedes^ 

 and two of Millipedes. 



With the exception of the two species of Cryptops obtained by 

 Mr. Lister, Mr. Andi'ews, during his stay on the island, rediscovered 

 all the species that had been collected by his predecessors, and, 

 in addition, supplemented the list by procuring one fresh species of 

 Millipede, three species of Pseiidoscorpions, one of which appears 

 to be undescribed, and adult and identifiable representatives of six 

 species of Spiders, as well as several other examples of this order 

 unfortunately too immature tor determination. 



Quite sufficient material, however, has been procured to show 

 that the fauna of the island bears unmistakable signs of derivation 

 from that of the area of the Oriental region, represented especially 

 by Burma and Java, lying to the north. 



There is no evidence that any of the species have been intro- 

 duced artificially. Indeed, the absence of such forms as the 

 Spider Heteropoda venatoria, the Scorpion Isometrus eiiropceus 

 {= macidatus, De Geer.), and the Centij)ede Scolopendra morsicans, 

 which accompany man in all his wanderings and establish them- 

 selves wherever the conditions of existence are favourable, seems 

 to indicate that the species or their ancestors now found in the 

 island crossed the sea that separates it fi-om Malaysia by purely 

 natural means — the Scorpions and the Myriopods and possibly some 

 of the Spiders in connection, in all probability, with floating tree 

 trunks or other vegetation ; the majority of the Spiders, especially 

 the web- spinning, bush-living species, on their so-called gossamer 

 webs in the early days of their existence ; and the Pseudoscorpions 

 by clinging to the legs of flies or bees, or lurking beneath the 

 elytra of beetles. 



Class CHILOPODA. 



Family CEYPTOPID^. 



1. Cryptops hortensis, Leach. 



One specimen apparently identical with the typically Palaearctic 

 species C. hortensis, collected by Mr. J. J. Lister. Mr. Andrews 

 did not find this species. 



2. Cryptops inermipes, Poc. 



Pocock: P.Z.S., 1888, p. 556, fig. 1 ; Ann. Mus. Geneva (2), x, p. 422, 1891. 



This species was based upon specimens obtained in Christmas 

 Island by Mr. J. J. Lister. It has subsequently been found by 

 Sig. L. Tea upon Mount Mooleyit, in Tenasserim. 



Mr. Andi'ews did not rediscover this species. 



