2s 



EiNAE LOXXBERG, 



sack, constituted by tunica vaginalis, but this is empty as the testicles 

 are still situated in the abdominal cavity. The penis has already 

 nearly assumed its definite shape which will be described more fully 

 under stage /'. The only difference in this stage lies therein that the 

 filiform urethral prolongation is comparatively less developed. It reaches, 

 however, a good deal beyond the tip of the glans. 



About 11 palatal elevations are developed on either side but 

 they are all smooth, not erenulated as in later stages. 



3) A foetus of Gephalophus melanorhoeus ç c, measuring from 

 the forehead to the anus 140 mm., and from the snout to the occi- 

 put 52 mm. 



In addition to the hairs and bristles of the stage b. there are 

 several hairs developed on the lips and on the chin of this foetus. 



The arched row of pores of the anteorbital gland shows di- 

 stinctly about 25 transverse series each consisting of three pores. 



There are already two pairs of teats each measuring 2 mm. 

 in length. The distance between the two pairs is about 4 mm. The 

 members of the posterior pair sit close together, only IV2 mm. apart, 

 the anterior ones 3 mm. apart. A vulva and a small protruding cli- 

 toris is developed. It is interesting to find that in this female foetus 

 the teats are four in number at an earlier stage than in the male, as 

 can be seen by comparing this and the following stages. This is quite 

 natural as the teats are more important organs for the female than for 

 the male, in which latter they are only rudimentary organs. This 

 latter fact could also be taken as an explanation for the condition 

 found in the male specimens. The development from two to four teats 

 should then only prove the variability of rudimentary organs. 



The general arrangement of the abdominal viscera of this foetus 

 is nearly the same as in stage b. The kidneys are surrounded at 

 their posterior ends by considerable quantities of fat. The ovaries are 

 situated about 1 cm. behind the kidneys. 



The large intestine seems already to have begun its retrograde 

 development as there are not quite 2 V 2 centripetal and IV2 centri- 

 fugal coils. But the transversal coil of the rectum behind the right 

 kidney still exists. The latter organ is ventrally, to å great extent, 

 covered by the liver, the caudate lobe of which protrudes beyond the 

 margin of the right lobe. The spleen is slightly beginning to assume 

 a triangular shape, although this is as yet only little pronounced. 



