388 Mr. G. Dollman on 



animal. In answer to an inquiry the Director of tlie Ter- 

 vneren Museum has been good enough to send me an extract 

 from his letter to Mr. Lydekker, to the effect that in the 

 Tervueren Museum there are two horned Okapis — a stuffed 

 skin standing 145*5 cm. at the shoulder, and a mounted 

 skeleton of another individual. That Mr. Lydekker should 

 speak of " the mounted skin of; the specimen to which the 

 skull pertained " is calculated to lead to confusion in the 

 future. 



Returning to the main thesis, that hornless Okapis are 

 larger than horned ones, it may be noted that the two skulls 

 figured by Dr. C. I. Forsyth Major (Proc. Zool. Soc. 1902, ii. 

 pp. 342 & 343) and by Monsieur J. Fraipont (' Annales du 

 Muse'e du Congo,' Zool. ser. 2, vol. i., Okapia, 1907, plates 

 iii. & v.) are of the same age, both being fairly old, but the 

 horned skull is the larger of the two. And again, the cast of 

 the horned skull purchased of Mr. Rowland Ward by the 

 British Museum (B.M. reg. no. 7. 12. 25. 2) is in most 

 measurements larger than the skull presented by Sir Harry 

 Johnston (B.M. reg. no. 1. 8. 9. 51). It is true that the 

 former is an older skull than the latter, but the comparison 

 weakens the generalization that the hornless are larger than 

 the horned animals. 



As regards the connexion between horns and sex referred 

 to by Mr. Lydekker, it is remarkable how little is definitely 

 known, for the natives invariably cut away the genitals when 

 skinning the animal ; and an unbiassed investigation of the 

 subject is made more difficult than it need be by taxidermists 

 skilfully adding male external genitals when stuffing skins 

 which have horns, and which they are convinced must there- 

 fore be of male sex. The relation between horns and sex is 

 dealt with in Sir E. Bay Lankester's forthcoming "Atlas" 

 (' Monograph of the Okapi/ Atlas, London, 1910). 



XLIII. — A List of the Mammals obtained by Mr. R. B. Woos- 

 nam during the Expedition to Lake Ngami t with Field- Notes 

 by the Collector. By Guy DOLLMAN. 



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



The following is a list of the mammals collected by Mr. R. B. 

 Woosnam during the recent expedition to Lake Ngami. 

 The collection was chiefly made at Lake Ngami and Lehuti- 

 tung in the Kalahari Desert, a certain proportion of the 



