281 



The ninth (sacral) one was exceptionally strong with powerful 

 transverse processes. Its hinder face bore two pairs of facets 

 (Fig. 3 h and c) for articulation of the urostyle; and careful examination 

 of the dried remains of the investing tissues, proved conclusi- 

 vely that that structure was in articulation with the dorsal pair of facets 

 at the time of death. These secondary facets were derived from 

 a bony upgrowth of the centrum, which, while largely obliterating the 

 neural canal, left space sufficient for the transmission of the filura 

 terminale and delicate tenth pair of spinal nerves above, while it 

 only partially constricted the foramina of exit for the ninth pair. In 

 the absence of the soft parts it must therefore be assumed the spinal 

 axis and nerves remained uninjured. That the urostyle had under- 

 gone a displacement late in life there can be little doubt, but it is 

 altogether contrary to precedent among vertebrated animals to meet 

 with the formation of a second articular - surface upon loss of, or in- 

 jury to, the primary one. The displaced urostyle, instead of becoming bu- 

 ried in the adjacent tissues, or ankylosed to an adjacent bony structure 

 as is sometimes the case under like circumstances i), retained its connection 

 with the sacral vertebra; from this there were developed two secon- 

 dary articular -heads, indistinguishable from the primary ones except 

 for their slightly smaller size. This process, although not strictly 

 one of reproduction of a lost part, is closely akin to it and, so far 

 as I am aware, novel for a vertebrated animal. 



Bericlit^) 



über (lie Sitzungen der 

 „Sektion für Anatomie und physische Antliropologie" 



der 59. Versammlung deutscher Naturforscher und Ärzte zu Berlin. 



2. Sitzung Dienstag, den 21. September IIV2 Uhr. 

 Vorsitzender: Herr Hartmann. 



1. Herr W. Flemming demonstriert eine Wandkartenzeichnung 

 (Format 30 : 1) des menschlichen Augendurchschnitts im horizontalen 

 Meridian, welchen er für Unterrichtszwecke publiziert (Wissenschaftl. 

 Ausstellung Nr. 26). Die Karte ist nach eigenen neuen Messungen 

 an einer größeren Anzahl frischer menschlicher Bulbi möglichst getreu 

 der natürlichen Topographie gezeichnet. Für die Messungen wurde 



1) Cf. Flowee P. Z. S. 1879 p. 668 and Sütton, ibid. 1886. p. 214. 



2) S. diesen Anzeiger Nr. 10. 



22* 



