513 



Fig. 3. Nucleus and sphere of primary spermatocyte during growtii period showing 

 contraction-phase of the nuclear contents, also persisting chromatin nucleoli. 



Fig. 4. Nucleus and sphere of primary spermatocyte showing spireme stage of 

 the former with chromatin nucleoli. The centrosome of the sphere has divided. 



Fig. 5. Late prophase of division in a primary spermatocyte showing nine chromo- 

 somes among which is the curved "odd" chromosome ; from a smear preparation. 



Figs. 6, 7, 8. Late prophase of divisions in primary spermatocytes. 



Fig. 9. Metaphase of division in a primary spermatocyte; the odd chromosome 

 lies to the left. 



Fig. 10. Metaphase of division in a primary spermatocyte; the odd chromosome 

 has passed undivided to one pole. 



Figs. 11, 12. Metaphases of divisions in primary spermatocytes, showing the odd 

 chromosome in different positions. 



Figs. 13, 14, 15, 16. Late prophase of divisions in secondary spermatocytes which 

 contain the odd chromosome. 



Figs. 17, 18. Anaphase of divisions in secondary spermatocytes showing the odd 

 chromosome dividing. 



Figs. 19, 20, 21, 22. Anaphases of divisions in secondary spermatocytes which 

 contain the odd chromosome. 



Figs. 23, 24. Late prophases of divisions in secondary spermatocytes without the 

 odd chromosome. Fig. 24 is from a smear preparation. 



Fig. 25. Metaphase division in a secondary spermatocyte without the odd chromo- 

 some, from a smear preparation. 



Figs. 26, 27, 28, 29. Late anaphase of division in secondary spermatocytes without 

 the odd chromosome. 



Fig. 30. Two chromosomes of a secondary spermatocyte in process of division.. 



Figs. 31, 32, 33. Spermatids which have received the odd chromosome, showing 

 the relation of the latter to the remaining chromatin mass. 



Fig. 34. A spermatid which has not received the odd chromosome. 



Fig. 35. A spermatid which has received the odd chromosome. Compare with 

 Fig. 34 and observe the difference in the bulk of chromatin. 



Figs. 36, 37, 38. Successive stages in the transformation of the spermatid into 

 the spermatozoon. 



Fig. 39. Mature spermatozoa showing the difference in size between the two 

 classes. 



Fig. 40. Section of the head of a spermatozoon showing a series of internal 

 unstained and highly refractive bodies. 



Nachdruck verboten. 



lieber das Vorkommen Ton Hautdrüsenorganen bei den anthropo- 



morphen Affen. 



Von August Brinkmann, 



Prosektor anatomiae an d. Kgl. Tierärztlichen und Landwirtschaftlichen 



Hochschule zu Kopenhagen. 



Mit 6 Abbildungen. 



Bei den niederen Säugetieren findet man bekanntlich überall in 

 den verschiedensten Ordnungen Hautdrüsenorgane, die oft, wie z. B. 

 bei den Chiropteren und Ungulaten, in erstaunlichem Formenreichtum 

 auftreten können. 



Bei den höheren Abteilungen der Säuger aber sind ähnliche Organe 

 seltener zu beobachten. Ganz besonders auffällig ist dies bei den 



Anat. Anz. 2XZIV. Aufsätze. 33 



