2G0 Mr. R. I. Pocock on 



The cliief structuval difFtM-ences between C. faloipes and 

 C. Simoni may be briefly tabulated as follows : — 



a. The distal teeth of the row running along the underside of 



the mandible forming an isolated internal series close to 

 the inner fringe of hairs ; the posterior (external) edge of 

 the maxillary process forming a concave curve corre- 

 sponding to the convex curve of the adjacent segments of 

 the palp when the femur of the latter lies vei'tically ; thii-d 

 and fourth legs much less thickly spinous, only about a 

 dozen spines on the anterior side of the tibia of the fourth, fu'vipes. 



b. Distal teeth on underside of mandible forming a continuous 



curved series with the remainder, but not reaching the 

 internal fringe ; posterior (external) border of maxillary 

 process with its concave curvature much stronger than 

 the convex curvature of the basal segments of the palp 

 when the femur lies vertically, i. e. when the apex touches 

 the underside of the femur a space equalling at least half 

 the width of the maxilla separates the two ; third and 

 fourth legs much more thickly spinous, about thirty or 

 forty spines on the anterior side of the tibia of the fourth. Siniemi. 



Up to the )3resent time the remarkable and isolated genus 

 Calommata of Lucas has been represented by a single species, 

 C.fuIv>pes,'Luc., from Java and Sumatra; one, G. ohesum, 

 from Bankok ; one, C. trucidentum^ from Burma ; and one, 

 C. signatum, from Japan. These forms are not distinguish- 

 able by their diagnoses, and are, perhaps, identical. More- 

 over, the genus was held to be confined to South-eastern 

 Asia *. Little was it to be expected that it would turn up in 

 tropical West Africa f- Mr. G. L. Bates is to be very 

 much congratulated on this unexpected discovery, which adds 

 one more to the many interesting novelties we owe to his 

 industry. 



Family PisauridaB. 



Genus DOLOMEDES, Latr. 



DoJomedes actceon, sp. n, 



? . — Colour. Carapace deep brown, obscurely marbled 

 with olive-brown and yellow patches ; a large triangular 



* C. ftdvipes was ha.sedi upon a specimen alleged to have come from 

 Bahia. In Keyserling's collection, now in the British Museum, there is 

 a specimen ticketed " Bahia," and labelled as Lucas's tj^pe. This speci- 

 men I cannot distinguish specifically from a Javan specimen in the 

 Museum, which is presumably identical with Pelecodon sundaica, Dol. 



t Mr. Oldtield Thomas reminds me that this remarkable case of distri- 

 bution has several parallels amongst the Mammalia, notably that of the 

 rodent Nannosciurus, which is represented by species inhabiting Borneo, 

 the Philippines, and the Camaroon district of West Africa. 



