On Mammals from the Ja River, Cameroons. 4L 



disappears entirely in the outer half or quarter of the cirri ; 

 the smaller cirri are quite without it. 



The ten arms are 30 mm. long ; the proximal arm structure is 

 the same as that of 0. adeona; ; the ossicles of the I Br series 

 and the first two brachials are broad and are in lateral contact 

 through produced and fiange-like ventrolateral borders, the 

 outer edges of which are parallel to the longitudinal axes of 

 the segments which bear them. 



Pj is 5 mm. long, with nine segments, rather slender but 

 considerably stiffened, recalling Pg in the more delicate 

 varieties o£ Sleplmnometra vwnacantha ; the first segment is 

 about one-third broader than long, the second half again as 

 long as the proximal width, slightly trapezoidal, the third 

 about three times as long as its proximal diameter, the fourth 

 to the sixth slightly longer, the following rapidly diminishing 

 to the small terminal segment; the second to the fourth 

 segments are slightly constricted centrally ; P2 is 4 mm. long, 

 with nine segments, similar to Pi, but very slightly stouter 

 and with slightly shorter segments ; P3 is 2*5 mm. to 3 mm. 

 long, with eight segments, more slender and less stitfened 

 than the preceding; P4 is 2 mm. long, small, slender, and 

 weak, with eight or nine segments; the next two pinnules 

 are similar to P^; the following gradually become elongated, 

 the distal pinnules being from 4*5 mm. to 5 mm. in length, 

 with thirteen segments, of which most are from two to three 

 times as long as broad and very slender. 



Type Locality. ' Siboga'' Station No. 305; mid-channel of 

 Solor Strait, off Kampong Menanga ; 113 metres. 



IV. — Mammals from the Ja River, Cameroons. 

 ]iy Oldfield Thomas. 



(Publislied by permission of the Trustees of the British Museum.) 



Kerivoula cuprosa, sp. n. 



A small speckled brown species with short incisors. 



(Size decidedly less than in the related species K. a:rosa 

 and lanosa. Fur soft and fine (hairs of back 6-6'5 mm. in 

 length), extending on to the forearm, thinly along the pollex 

 and terminal part of the third digit, and down the upper side 

 of the legs on to the feet; proximal part of interfemoral 

 thinly hau-ed, naked distally, tiie hinder margin with a 



