ARACHNIDAN FAUNA RAINBOW. 109 



lateral granulations ; inferior surface pale yellowish, with two 

 longitudinal sub-median rows of brown granulations. 



Measurements : Length of body, l|mm. ; breadth, 1 mui. ; 

 palpi, 2uim. 



Two specimens. 



Order ACARINA. 

 FAMILY ORIBATID^. 



Genus ORIBATA, Lat. 



Oribata lamellata, sp. nov. 



(Plate ii., figs. 3, 3a, 36, 3c, 3d.) 



Cephalothorax, |mm. long; abdomen, 1mm. long, liiim. wide. 



Black, opaque ; tergum laminated ; venter somewhat rugulose, 

 closely punctated. 



Cephalothorax arched, closely and deeply punctated ; anterior 

 half conical, posterior half suddenly widening ; rostrum round 

 pointed ; rostral hairs long ; palpi invisible from the dorsal 

 aspect ; pseudo-stigmata nearly at the base of the Cephalothorax. 

 but not hidden by the abdomen or lamellae ; pseudo-stigmatic 

 organ rather short, with thin peduncles ; the latter gradually 

 thickening and terminating with somewhat clavate heads ; apode- 

 mata not joined to the sternum. Legs strong, closely and finely 

 punctated, furnished with short, strong white hairs ; claws 

 tridactyle, heterodactyle. Abdomen strongly arched, somewhat 

 oval, closely punctated, laminated, the plates overlapping, 

 broadest about the middle, strongly keeled behind ; genital and 

 anal plates large, oval, and occupying nearly the whole length of 

 the ventral plate. 



In respect of this creature Mr. Hedley says : " On the western 

 side of the north arm of the mangrove swamp is a low scarp of 

 breccia, apparently an old beach, and which is described more 

 fully in the Section treating on the Geology of the Atoll. A 

 dense growth of Ngia (Pemphis acidula) overhung this spot, and 

 under fallen damp leaves and sticks beneath these bushes I found 

 this animal in considerable abundance. Its movements were 

 lethargic in the extreme." 



Order ARANBID^E. 

 FAMILY EPEIRID^. 



Epeira mangareva ? Walck One specimen. 



Walck. Hist. Nat. des. Ins. Apt., iv., p. 469, 1847. 

 L. Koch, Die Arachniden Australiens, i., pp. 85-88, T. vii., figs. 

 4-5a, 1871. 



