90 MR. K. ANDERSEN ON BATS [May 16, 



It looks like a dark and a light " phase." The dai'k phase 

 differs from that of lih. horneensis, chiefly, in having the under 

 side of the body much lighter, in strong contrast to the colour of 

 the upper side, and in having also the base of the hairs of the 

 upper side much lighter. The light phase is, as will be seen from 

 this description, totally different from the " cadmium orange " 

 phase of borneensis (and more approaching the light phase of 

 Bh. qffinis himcdayanus). 



Skull. Essential characters as in Rh. borneensis, but the median 

 anterior nasal swellings somewhat more distinctly marked off 

 from the lateral anterior swellings. 



Dentition. Pg external ; p., and p^ almost in contact ; p' in row, 

 cusp extremely small. 



Measurements. On j). 92. 



Distribution. Biserat (Jalor, Malay Peninsula). Laos Mts. 

 (Siam). 



Technical name. The type is in the British Museum. 



Remarlis. From the Laos Mountains, Siam, I have seen one 

 dried skin only (Tomes Collection) ; it looks like a light -coloured 

 phase of lili. malayamis ; the nasal swellings of the (fragmentary) 

 skull have the shape characteristic of this species. But fi-esh 

 material from that region is desirable. 



9. Rhinolophus nereis, sp. n. (Plate III. fig. 7 a, b, c.) 



" Ehinolojj/ius rouxii ? " (non Temm.) Gerrit S. Miller, Jr., 

 Proc. Wash. Ac. Sci. ii. (Aug. 20th, 1900) p. 234. 



Diagnosis. Allied to Rh. borneensis, and of about the same size, 

 but with much larger skull and teeth. Lower leg considerably 

 longer: 21mm. Tail comparatively very short : 17mm. Fore- 

 arm about 45 mm. 



Details. In addition to the above : — The second phalanx of the 

 third finger is more than 1| the length of III.^ ; this is the first 

 time we have to note a decisive lengthening of III." ; in Rh. bor- 

 neensis, as in all the foregoing species, III." (always, in this paper, 

 measured without the terminal cartilaginous rod) is invariably 

 less than 1| the length of III.'; compare with this /lA. stheno, 

 thomasi, affinis, ferrtmi-eqidmmi. lY.^ is comparatively shorter- 

 than in Rh. borneensis, only about | the length of the meta- 

 carpal of the same finger ; compare with this Rh. stheno. 



Colour. 5 ad. (type) ; September; teeth almost quite unworn; 

 first preserved in formalin, now in alcohol ; probably unfaded. — 

 " Mars-brown " above ; base of hairs " ecru-drab " ; of a peculiar 

 yellowish "drab" beneath (?the yellow due to the influence of 

 formalin). 



Skull. Of the same geneial shape as in Rh. borneensis, but 

 much larger, with considerably lai-ger teeth, and thei-efore longer 

 tooth-row ; orbital constriction veiy narrow. The following 

 measurements, in millimetres, will give a more precise idea of the 

 differences (the ciphers in brackets are the measvirements of 

 eleven skulls of Rh. borneensis) : — total length, inion to front 



