698 MR. F. E. BEDDAKD ON THE [June 16, 



It is interesting to note that, so far as the intestine is concerned, 

 Ghiromys comes closer to the Lemurinee than to any of the other 

 subfamilies of the Lemuroidea. I have pointed out that in the 

 more specialised Lemuroidea, so far that is to say as concerns the 

 intestine, the elsewhere characteristic carpal vibrissee have dis- 

 appeared. This conclusion will require amending since they are 

 undoubtedly absent in Chiromys, a fact which my colleague 

 Mr. Pocock observed independently of myself. Nevertheless it 

 cannot be doubted that in other respects Chiromys is a specialised 

 Lemiu', so that after all the statement may still hold. 



The rest of the colon is disposed in a curved course to the 

 rectum, and there are no traces of any further ansfe coli. 



There is in Chiromys the usual cavo-duodenal ligament, which 

 was not so clearly a single sheet of membrane as is generally the 

 case. In one specimen it was single ligament of the usual type ; 

 in the two others a duodeno-renal portion could be differentiated 

 off, attaching the end of the loop of the duodenum to the right 

 kidney. An hepato-caval ligament was present also in the same 

 two specimens. On the left side of the body the lieno-rectal 

 ligament was plain, and also the lieno-renal. I may add that the 

 right lateral lobe of the liver was attached — naturally on the 

 right side — by a ligament to the parietes just at the origin of 

 the dorsal part of the diaphragm. I identified this ligament in 

 all three individvials. In an example of Lemior hrunneus the 

 right lateral lobe of the liver was also attached to the parietes by 

 a ligament. I also recognised in this Lemur the hepato-caval and 

 hepato-renal ligaments. On the left side of the body of this 

 species of Lemur the lieno-renal and lieno-rectal ligaments were 

 also very plain. 



The vascular system has not been much dealt with by my 

 predecessors. As is already known the aortic arch gives rise to 

 two trunks. The intercostal ai'teries of mammals show some 

 variation in their mode of origin from the aoi'ta. Here again, 

 however, there are not sufficient facts known to dedvice any 

 results of classificatory importance. I take this opportunity of 

 comparing the mode of origin of these little arteries in Chiromys 

 with those of some other mammals. 



In Chiromys the first pair of intercostals arise symmetrically 

 and very close to each other. The next four are also symmetrical 

 bvit a trifle further apart. Then follow two pairs which are as 

 displayed in the accompanying figure (text-fig. 152), the artery 

 of the one side being much in advance upon its fellow. The 

 remaining pairs are symmetrically paired as are the first of 

 the series, but the distance between the orifices of each pair 

 of arteries differs. In an example of Pseudochirus peregrinus, of 

 which I cut open the aorta and examined the mouths of the inter- 

 costal arteries, they were strictly paired and quite regular. In 

 Hystrix cristata I counted seven intercostals in front of the 

 diaphragm, which however did not commence until the ninth 

 rib. These arteries were single at their origin from the aorta. 



