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



in cases, a left hemiazygos. I do not for the present give any 

 details concerning the Monkeys and Anthropoid Apes. 



(5) Edentata. 



Of this group of mammals I have only been able to examine a 

 few of the South- American forms. 



In the Great Anteater, Myrmecophaga juhata, there is only a 

 right azygos, with no traces that I could discover of the left-hand 

 vessel. As this statement refers to three examples, including 

 both sexes, it is probably a statement of the normal state of affairs 

 in this animal. In one example, at any rate (I have not notes on 

 the others), the first affluent occupied the 4th intercostal space. 



Of the small Anteater, Tamandua tetradactyla, I have examined 

 but a single specimen, in which the conditions of the azygos were 

 quite the same. 



In two Armadillos, Dasypus villosus and D. minutus, the right 

 azygos was also alone present. Hyrtl, in his accouat of the 

 anatomy of Chlamydojyhorus, only found, or at least only men- 

 tions, the right azygos. These facts afford an additional argu- 

 ment, though doubtless a small one, for the banding together of 

 the American Edentates. 



(6) Oarnivora. 



The azygos vein in this order of mammals presents a very 

 uniform arrangement. I have dissected a considerable number 

 of species belonging to many geneia, and in the great majority of 

 them there is but one azygos present, which is that belonging to 

 the right side of the body. In these I have not been able to find 

 any trace of the vessel of the left side. The following species 

 present this condition of the azygos veins, viz. : — Galictis harhara, 

 Crossarchus ohscurus, Cynictis levaillanti, Vwerra civetta (2 ex- 

 amples), Nandinia binotata, Cercoleptes caudivolvid^ts (3 examples), 

 JVasua 7^ufa (2 examples), Felis ])ardus, Procyon cancrivorus 

 (3 examples), P. lotor, Lutra vulgaris (2 examples), Helictis per- 

 sonata, Gryptop)rocta ferox, Herpestes griseus, H. 2^idvertdentus, 

 Arctogalidia trivirgata, Proteles a^istahis, Gulo luscus. 



In two specimens of Procyon cancrivorus the azygos of the 

 right side received a hemiazygos from the left side about halfway 

 down, and there were no vena? intercostales supremfe. In Procyon 

 lotor I found no hemiazygos, but there were two venae intercostales 

 superior on the right side, supplying the first two ribs and oj)ening 

 separately into the precava. On the left side a single vein opened 

 into the subclavian. 



The azygos vein in the Hyaena {Hycena crocuta) (text-fig. 68) is 

 the most remarkable modification of this vein which I obsei-ved 

 in the Oarnivora. As has been noted, the azygos in the Oarnivora 

 is constantly a long S-shaped A'essel lying on the right side and 

 extending down to the diaphragm, giving off regular branches. In 



