1865. ] ANATOMY OF NYCTICEBUS. 255 
tion that the liver, which, according to our authors, offers “‘de grandes 
différences individuelles,” in our specimen showed a very interesting 
uniformity in the number and relative dimensions of its lobes. 
It corresponded with the conditions represented and described by 
Professor Huxley’ as existing in the allied form of Arctocebus. 
The liver in Loris does not seem to be very different, according to 
Buffon* and Martin®. In Chetromys* there is also a singular re- 
semblance to Nycticebus tardigradus in the form and divisions of 
this organ. 
This extends even to the direction of the fundus of the gall-blad- 
der, which, according to Professor Peters’, in a paper read at Berlin 
in April 1864, is in Chetromys directed in the normal manner, in- 
stead of the abnormal manner peculiar to the other Madagascar 
Lemuroidea. 
The ceecum has the elongated prolongation (like, if not really and 
essentially, a vermiform appendix) which is figured and described in 
the memoir. 
The comparatively small zoological importance of this character is, 
however, shown by the fact that in Cheiromys a condition exists 
very similar to that presented by Nycticebus, while in the closely 
allied genus Arctocebus* and in Loris’ there is no trace of any such 
prolongation. 
The generative organs present no difference, worthy of remark, 
from the description already given in the memoir on Stenops, the 
uterus being bicorned, and the clitoris very large and perforated 
by the urethra. The kidneys, suprarenal capsules, and bladder are 
similar to-those of Arctocebus®, except that the ureters do not enter 
so low down towards the neck of the bladder. 
If we sum up the results of our investigation upon the anatomy of 
Nycticebus tardigradus, we are led to note the interesting peculiari- 
ties offered by the muscles of the limbs,—on the one hand, the re- 
appearance and, as it were, exaggeration of that anthropoid muscle, 
the flexor longus pollicis ; on the other hand, its resemblance, by the 
interlacements of its tendons with those of the flexor profundus, to 
the conditions always offered by the foot in Primates—a resemblance 
which has already been noticed by Professor Huxley in his Hun- 
terian Lectures for 1864. 
We are also struck with the almost atrophied gastrocnemius, but 
concomitantly augmented flexor longus communis, which last, in- 
verting the analogy of the flexor longus pollicis, resembles a hand- 
flexor in its origin from the proximal bone of the limb. 
Likewise are we impressed with the very large size of the rectus 
1 Proc. Zool. Soc. 1864, p. 330, fig. 9. 
2 Hist. Nat. tome xiii. p. 216. 
3 Proc. Zool. Soc. 1833, p. 23. 
* Owen, loc. cit. p. 73. 
5 See Notice in Nat. Hist. Review, Jan. 1865, p. 149. 
® Huxley, Proc. Zool. Soc. 1864, p. 329, fig. 9. 
7 Buffon, Hist. Nat. vol. xiii. pl. 31. fig. 2. 
® Huxley, Proc. Zool. Soc. 1864, p. 332, fig. 11. 
