188 MR. F. E. BEDDARD ON THE [Feb. 19, 



In Gazella euchore (the example dissected was a male) the dis- 

 position of the several veins of the azygos system was as follows 

 and as is shown in the accompanying illustration (text-fig. 63). 

 The illustration in question shows that the subclavian veins are 

 symmetrical with each other and occupy the usual position, 

 emerging as they do in front of the first rib. To the left sub- 

 clavian is attached the corresponding vena intercostalis siqyrema. 

 This vein collects blood from the second and third intercostal 

 spaces. I am not absolutely certain whether its longitudinal 

 trunk is not continuous with the left azygos. The latter com- 

 mences with a branch from behind the fifth rib ; it enters the 

 heart on a level with the sixth or seventh rib. The right 

 azygos is fairly well developed and enters the precaval vein on a 

 level with the second rib. It collects blood by branches from the 

 second to the fifth intercostal spaces inclusive. 



In a female Gapra megaceros the left azj^gos also opened directly 

 into the auricle ; its first branch arose from behind the sixth rib. 

 Anteriorly, a superior intercostal consisted of two bi'anches 

 lying respectively between ribs 1 and 2 and 2 and 3. On the 

 opposite side a vessel corresponded exactly to this in point of 

 entrance into the precava, but drew blood only from the first 

 intercostal space. Immediately behind this opens the right azygos, 

 which is made up of four intei'costal branches from ribs 2 to 5. 

 In another example, also a female, the azygos was also on both 

 sides, but the right vein was smaller than in the specimen just 

 described and only drew blood from two intercostal spaces. 



Hemitragus jemlaica ( S juv.) is rather different in the arrange- 

 ment of these various veins. There is, on the left side, the typical 

 Artiodactyl azygos entering the heart directly and commencing 

 with a branch in intercostal space 4/5. There is no superior inter- 

 costal on this side ; and on the right side there is only a single 

 vein and that corresponds to the superior intercostal, since it 

 draws blood only from behind the second rib. 



Of ]Sfemorh<xdiis sivettenhami I have dissected a single male 

 example. As usual, the left azygos was the predominant vein 

 concerned with the intercostal circulation. It receives branches 

 from the fifth rib ouAvaids, and the main trunk was traced some 

 way into the lumbar region behind the last (i. e. the thirteenth) 

 rib. The vena cava anterior receives the right azygos and a 

 corresponding vein exactly opposite to it on the left side. The 

 former receives blood from the first six ribs and ends entirely at 

 the level of the sixth lib. The corresponding vein of the left side 

 lias naturally fewer branches and ends at the fourth rib. I did 

 not ascertain whether there was any connection between the 

 anterior and jjosterior series of intercostal veins on the left side of 

 the body. 



In an old example of Phacochcerus cethiojncus (text-fig. 64) the 

 azygos veins were rather different from those of the two species 

 just described. The geneial plan was the same: that is, there is 

 a long azygos vein on the left side. This vein started with an 



