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Show 556 MR. R. i. POCOCK ON THE ARACHNIDA, [Dec. 4, 11. On the Arachnida, Myriopoda, and Land-Crustacea of Christmas Island. By R. I. POCOCK, Assistant Nat. Hist. Museum. [Eeceived October 15, 1888.] Although not extensive in numbers either of species or individuals, Mr. Lister's collection of the above-mentioned groups of animals presents some features of no little interest. No Chilopod has ere this been recorded from the island, and amongst the specimens obtained are examples of two species of Cryptops, a genus which 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 iuseparable 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 genus; but this fact, considering the scantiness of our knowledge of the Diplopod fauna of the neighbouring lands, is not surprising. With the exception of one worldwide 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 Hylaeocarcinus (Wood-Mason). CHILOPODA. SCOLOPENDRID-E. C R Y P T O P S H O R T E N S I S (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 Myriopoden der Oster.-Ungar.-Monarchie,' i. - p. 153 (Alfred Holder, Vienna, 1880). One specimen under 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. Antenna long, slender, imperfect, being composed of but sixteen segments ; segments cylindrical, the proximal short and thick, and sparsely |