The G cog rapldcal Races o/"GaIago crassicaudatua. 47 



structure of tlie auditor}' bulla from all the otlier Felidse of 

 America. These cats have been affiliated with the Old- 

 World forms F. ocreata and sylvestrls, but their atfinitifs 

 a])pear to me to be clearly with their compatriots probably 

 of the i''. geoffroyi g;roup. 



To sum up : the American Felidse, laroe, small, and 

 medium-sized, may be relegated to the following groups : — 



1. Group exemplified by F. pardalis and F. iciedii. 



2. Group exem|)lified by F. giu'gna, F. pai-dinoides, F. saii- 



nnum, F, genjfroi/i, F. tigrina, and F. jaguarondi. 



3. Group exempli tied by F. colocolo and F. pajeros. 



4. Group exemj)litied by F. canadensis and F. ruffus. 



5. Group exem])lirtcd by F. concolor. 



6. Group exemplitied by Panthera onca. 



HI. — The Geographical Races of Galago crassicaudatus. 

 By Oldfield Thomas. 



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



In his ' Primates' Dr. D. G. Elliot has recognized a number 

 of species of the Galago crassicaudatus group, these S])ecies 

 being arranged practically without regard to their geographical 

 relationships ; and an examination of our specimens would 

 seem to show that some revision of the group is necessary. 



In the first place, a study of the skulls indicates that the 

 East-African forms — hindei *, 2ya}iganiensis, lasiotis, hadius, 

 kikuguensis, and agisymhanus, — which Dr. Elliot has either 

 sandwiched between or united with the forms from Nyasa 

 and southwards, are really distinguishable irom all the latter 

 by their smaller skulls. 



There is a good deal of variation in East Africa as regards 

 skull-size, and there are probably several valid races there, 

 but these I have not at present material to deal with. 



On the other hand, the more southern skulls — Rhodesia to 

 Zululand — are really very uniform in size and pioportions, 

 when the changes and variations due to age and sex are 

 properly allowed for. The frequent references in Elliot to 

 the proportions of the muzzle are really based on characters 

 due to sex, the large broad-rooted canines of the male 



* References to all the published names mentioned in the present 

 paper are given in Elliot's 'Primates,' i. pp. 54-63, and are not now 

 repeated. 



