168 MR. F. E. BEDDARD ON THE [ Feb. 16, 
Manatus with that of Hyrax, but not in regard to the paired 
outgrowths. He has rather emphasised the median chamber in 
which they meet, and has compared this with the two chambers of 
the cecum of Hyrax as I consider them together with the median 
space common to the two. Lonsky observes that the ileum enters 
the middle chamber of the ceecum and that it is without an ileo- 
cecal valve. ‘The latter statement is certainly not true of H. dor- 
salis, the valve was quite obvious in the two specimens which I 
have dissected. Furthermore it appeared to me that the ileo- 
cecal orifice lay in this species of Hyrax in the lower and largest 
chamber of the cecum. The raised fold which separates off from 
this latter subdivision the two diverticula (as I regard them) can be 
distinctly seen to join the posterior lip of the ileo-czecal valve, @. é.. 
that nearest to the colon. On the other hand, there is undoubtedly 
on each side a branch of this fold which passes to the other side 
of the ileo-cecal orifice. The posterior fold, however, appeared 
to me to be the most important. The question is obviously a 
difficult one to be decided. Finally (as regards the alimentary 
tract) I may remark that the present species, Hyrax dorsalis, 
differs from H. capensis and agrees with H. syriacus as described 
by Lonsky, in possessing a longish cecal appendage of the colon 
lying between the true cecum and the paired colic appendages. 
Nearly up to the very tip of this diverticulum, which is about an 
inch long, is attached the ceco-colic ligament, the other attach- 
ment of which to the cecum has been already described. 
Although Hyrax capensis does not possess this diverticulum, there 
is certainly a slight dilatation of the colon where the czco-colic¢ 
ligament is fixed. It does not appear to exist in Hyrax brucei*. 
The Testes of Hyvax dorsalis and H. capensis.—In all the speci- 
mens of both of these species which I have examined, the testes 
(which are well known to be invariably intra- -abdominal) are partly 
enveloped by a freely hanging membrane of considerable cireum- 
ference, of which I can find no description in recent memoirs 
dealing with this Ungulate, and which therefore is at least not 
well known. The most recent and most elaborate survey of the 
genitalia of Zyrax (both male and female) known to me is in the 
memoir of Lonsky already referred to T 
Neither in the text nor in the figures illustrating it { does 
Lonsky refer to the membrane to which I shall presently refer 
at greater length. This structure has been described and figured 
by Pallas §, whose description runs as follows :—‘‘ Testes... . et 
margine libero coronati membranula, seu ala e peritonzeo facta et 
adipe striata, quee vasa a spermaticis accipit.” It is illustvated by 
a figure || which does not, however, represent quite accurately the 
conditions which are observable. The sperm-duct is represented 
* Chapman, P. Acad. Philad. 1904, p. 476: 
+ Jen. Zeitschr. xxxvii. 1903, p. 612 &c. 
{ Loe. cit. pl. 29. figs. 4, 5, 7. 
§ Spicilegia Zoologica, Berolini, 1767, Fasc. 2. p. 29. || Tab. ii. fig. 11. 
