1908,] AXTECHINOMYS AND OTHER MARSUPIALS. 579 



years ago a single specimen of G. maholi. In all of these the 

 ansa coli dextra (if I am right in so identifying the loop) is 

 coiled as is shown in the accompanying figure (text-fig. 114) into 

 a short spiral exactly like that of certain Rodents and most 

 if not all Artiodactyles, though much simpler than the spiral 

 of the vast majority of the latter. This characteristic spii'al 

 arrangement is entirely lost in the figure given by Dr. Mitchell *, 

 to which I here I'efer, though accurately represented by 

 Flower. The matter is of special interest because the same 

 spiral arrangement of the ansa coli dextra is to be seen in the genus 

 Nycticebus of the subfamily Lorisina?, as is abundantly shown 

 in the figures and descriptions of Vrolik f and Schroder van der 

 KolkJ, w^hich I am able to confirm by the dissection of two 

 ■examples of Nycticebus tardigradus. The resemblance to Galago 

 is exact. I am disposed to think that Dr. Mitchell's figure of 

 the Potto requires revision, in which animal he represents 

 two adjacent ansas coli disposed like those of many Rodents. 

 Dr. Mitchell has not referred to the papers cited below. 



The dissection of an example of Indris enables me to confirm 

 the figures of Milne-Edwards § as to the existence of a colic 

 spiral in the Indrisinfe which is more elaborate than in the 

 other types just dealt with. I may be permitted to point out 

 another relation between these Lemurs with a spirally tv/isted 

 ansa coli :! which has not been insisted upon. In the genera 

 where this occurs, i. e., in Galago, Loris, Nycticebus, Indris, and, 

 I imagine, Perodicticus, the characteristic carpal vibrissfe are 

 absent ; they are present in the remaining Lemurs with no 

 ansa coli or only a simple one. Specialisation of structure has 

 occurred concurrently in two features of their organisation. It 

 is important to notice that in these Lemurs with a simple or a 

 spirally twisted ansa coli, the omentum is attached to the loop 

 or spiral. Furthermore, the opposite side of the spiral is 

 attached to the caecum, or to the colon just where it leaves the 

 caecum, by a ligament, and the duodenum is attached to the 

 colon ju.st opposite to this latter ligament by a colico-duodenal 

 ligament. 



Hyracoideaj 



I have examined several examples of Hyrax capensis and have 

 more particularly studied two specimens of which one was 

 -specially favourable for .study. This example was not more 



* Zioc. cit. fig. 41, p. 506. 



t N. Verhandel. Neclerlaiidsclie lust. Amsterdam, vol. x. 184-4, p. 75. 



X Tijdschr. Xatiuu'k. Gesch. Leiden, viii. 1841, p. 277, pl.y. figs, vi., vii. ; aud a joint 

 paper %y these two anatomists in Bijdragen tot de Dierk. i. 1848-18541, p. 29. 

 Gegenbaur also (Vergl. Anat. Wirbeltli. "ii. 1901, p. 178) figures the spiral iu 

 Loris gracilis. So also does Klaatsch, though not, as I think, quite accuratelj^ 

 in Nycticehns. 



§ Hist. Xat. Phys. et Polit. de Madagascar. 



II I cannot understand Klaatsch's statement that "die rechte Colonfiexar ist . . 

 bci Lemur relativ noeh ma,chti2;er entfaltet als bei Steiiops." 



