1909.] 



STRUCTURE OF THE LESSER ANTEATER. 



701 



behind the kidneys, whereas in the adult they are at least inguinal 

 a,nd even descend it is alleged into a scrotum during the breeding 

 season. The animal measured about 4 feet 6 inches and was, 

 therefore, obviously not full grown. On the other hand, it was 

 as clearly in no way " newborn," and thus the long retention of 

 the testes within the abdomen must be a character of the animal 

 and not a mark of juvenility. 



Text-fig. 225. 



Postcaval veins of Orycteropus 



<T. Point of junction of left postcaval and left iliac vein 

 il. Iliac arterj'. pel. Left (smaller) postcaval, 

 renal veins, sp. Spermatic veins. 



Intercostal veins. 

 Kenal veins, sr. Supra- 



The veins were quite full of blood and in consequence easy to 

 follow. I am able therefore to give, with some confidence, the 

 following results of my examination of this specimen of Orycteropus 

 ccqjensis. The postcaval vein at first sight appeared to be single. 

 For in the middle line (text-fig. 225), or nearly so, to the right of 

 the aorta, lay a large turgid vein of the full calibre that such a 

 vein would be expected to possess in an animal of this size. A 

 closer examination, however, soon showed that on the opposite 

 side of the aorta, i. e. on the left side, lay another vessel, jjarallel 



