144 External Characters of Ruminant Artiodactyla. 



the extension beneath the inner angles of the nostrils in 

 front is wider. 



In the penis (fig. 4, A) the glandular termination is more 

 elongate and less bulbous than in Copra and the filiform 

 termination of the urethra is shorter. It is the shortest, 

 indeed, that is found within the limits of the Caprinte. 



The sub caudal gland is represented externally by a shallow 

 depression above and at the sides of the anus. 



Note on the Perils of the Cephalophinse and Neotraginae. 



In my paper published in the issue of this Journal for 

 June 1918, 1 regret that I overlooked at the time Lormberg's 

 descriptions and figures of the penis of Cephalophus natal- 

 ensis and of Sylvicapra grimmia (Ark. Zool. Stockholm,, (5) v. 

 no. 10, pp. 2-3, figs. 1-2, 1909). He shows that in C. natal- 

 ensis the urethral canal has a very long filiform prolongation 

 resembling that of Guevei maxwelli figured by Garrod 

 (P. Z. S. 1877, p. 10, fig. 20), whereas in S. grimmia the 

 tubular prolongation is quite short, only overlapping the 

 glans to a small extent. Now, C natalensis is so closely 

 related to C dorsalis as hardly to admit of a doubt as to 

 identity in the structure of the penis in the two species. In 

 that case the penis of C. dorsalis I described as being without 

 the tubular urethral prolongation must have been defective, 

 owing to mutilation. Lonnberg's observations show that 

 Cephalophus differs from Sylvicapra not by the suppression 

 of the urethral prolongation, as I stated, but by its develop- 

 ment and length, which affiliate the former genus with 

 Guevei. 



In the case of the Neotraginse, it may be recalled that 

 Garrod {op. cit. p. 11, fig. 21) described the penis of 

 Ourebia nigricaudata as possessing a long slender urethral 

 prolongation considerably overlapping the slender tip of the 

 glans penis, whereas, according to Lonnberg's observations 

 (op. cit. p. 4, figs. 3-4), the urethra does not surpass the tip 

 of the glans in Raphicerus campestris and Neotragus living- 

 stonianus. The penis of the example of Nototragus mela-r 

 notis in which I found the preputial gland agrees witli that of 

 Raphicerus campestris. 



