556 MR. R. I. POCOCK ON THE ARACHNIDA, [DcC. 4, 



11. On the Arachuida, Myriopodaj and Land-Crustacea of 

 Christmas Island. By R. I. PococKj Assistant Nat. 

 Hist. Museum. 



[Eeceived October 15, 1888.] 



Although not extensive in numbers either of species or indi- 

 viduals, Mr. Lister's collection of the above-mentioned groups of 

 animals presents some features of no little interest. No Cbilopod 

 has ere tliis been recorded from the island, and amongst the speci- 

 mens obtained are examples of two species of Cryptops, a genus wliich 

 has never before been reported from any part of the Oriental Region. 

 As might have been expected, one of these is new ; while, curiously 

 enough, the other is inseparable from the common C. hortensis 

 (Leach), which is tolerably abundant in the neighbourhood of 

 London. 



Such wide-spread and well-known Chilopoda as Scolopendra 

 morsitans (Linn.) and S. subspinipes (Leach) are conspicuous for 

 their absence. The two species of Diplopoda taken are new ; one, in 

 addition, constituting a new geims ; but this fact, considering the 

 scantiness of our knowledge of the Diplopod fauna of the neigh- 

 bouring lands, is not surprising. With the exception of one world- 

 wide form the Arachnida belong to species that have been described 

 only from Australia ; and it may perhaps be worth while in this 

 connection to call attention to the fact that Capt. Maclear brought 

 back in 1887 one specimen of Liocheles australasice (Fabr.), a 

 Scorpion that ranges from the Corea to the Fijis (see Proc. Zool. 

 Soc. 1887, p. 520). One species of a land-crab was taken. This, 

 in addition to its being a new species, is of interest inasmuch as it 

 renders justifiable the view that the genus Limnocarcinus (De Man) 

 should be regarded as a synonym of HylcBocarcinus (Wood-Mason). 



CHILOPODA. 



SC0L0PENDR1D.«. 



Cryptops hortensis (Leach). 



For synonyms and an excellent description of this well-known 

 European species and for references to the literature which treats of 

 it, see Latzel, ' Die Mvriopoden der Oster.-Ungar.-Monarchie,' i. 

 p. 153 (Alfred Holder, Vienna, 1880). 



One specimen i.nder a stone in Flying-Fish Cove. Although I 

 have subjected this specimen to a most careful examination, 1 can 

 find no reasonable grounds for separating it from the common 

 European form. 



Cryptops inermipes, sp. n. 



Colour ochraceous, cephalic and anal segments darker. AntenncB 

 long, slender, imperfect, being composed of but sixteen segments ; 

 segments cylindrical, the proximal short and thick, and sj)aisely 



