1899.] ON TRICHROMATIC PHOTOGRAPHT. 929 



actually overlap in their rauges and the Wood-cat is to be found 

 far out on the plains, the Grass-cat is unknown in the wooded or 

 riverine districts. 



The following are some measurements taken of two large males, 

 the first having been killed as far back as 1873 and the second 

 recently :— 



(1st) (2ncl) 



Length, inclusive of tail 38 in. 37^ in. 



Tail 12 12' 



Height before 15 13 



Height behind 141 



Girth of abdomen If) 14 



Girth of neck 11 iij 



Length of head 6 



Width of head 5 



Weight of first (very thin) 13 lbs. I have heard of one that 

 sealed 22 lbs. 



November 28, 1899. 



Dr. Henry Woodward, F.E.S., V.P., in the Chair. 



Mr. Oldfield Thomas exhibited the skull of a Baboon recently 

 obtained at Aden by Messrs. Percival and Dodson. It appeared 

 to represent a new species allied to Papio kamadryas, but dis- 

 tinguished by its small size, the row of upper cheek-teeth being 

 only 41-5 mm. in length. This species was proposed to be named 

 Papio arabicus. 



Mr. W. Saville-Kent, F.L.S., F.Z.S., stated that he had devoted 

 considerable attention since the meeting of the last session to the 

 subject of trichromatic or three-colour photography as applied 

 to the correct colour-registration of Zoological and Botanical 

 subjects. With the aid of the lantern he submitted a series of 

 examples upon which he had successfully experimented. These 

 included various species of tropical butterflies, orchids, fishes, 

 lizards, and birds. Among the slides displayed, that of a peacock's 

 feather, in which the characteristic tints were reproduced with 

 marked fidelity, was particularly referred to as a successful 

 demonstration of the capabilities of the system. Gold and Silver 

 Carp, Cuckoo Wrasses {Lahrus mixtus), and other marine species, 

 taken by Mr. Saville-Kent at the Plymouth Zoological Station, 

 yielded appropriate illustrations of the process as applied to the 

 colour-registration of the more brilliant but notably evanescent 

 hues of fishes. In the bird-section, especial prominence was 

 given to the correct colour-portrayal of the gaily plumaged 

 Australian finches Poephila cjouldi and P. mirahilis. These were 



