342 

 2. Note on the Excretory Cells of the Ascaridae. 



By Arthur E. Shipley, Cambridge. 



eingeg. 10. August 1897 K 



At the end of a somewhat long critique on Professor Nassonow's 

 interesting discovery that certain large cells in the body of Ascaris 

 megalocephala take up granules of carmine and Indian ink, when these 

 substances are injected into the body-cavity, Professor Spengel writes 

 as follows: ' Thatsachlich finden sich diese Zellen, was den sämmtlichen 

 früheren Beobachtern entgangen ist, nicht immer seitlich, zwischen 

 dem Darm und den Seitenlinien , sondern manchmal auch median, 

 auf oder unter dem Darm. Das ist die einzige Beobachtung, um die 

 ich bei dieser Gelegenheit die Kenntnis von diesen merkwürdigen 

 Zellen vermehren will'. — 



It is perhaps not a matter of any great importance, but 1 should 

 like to point out that these giant cells whose function Professor N as- 

 sono w has been the first to experimentally determine, have been 

 described and figured in the position indicated by Professor Spengel 

 by Dr. Hesse^, who calls them »Gewebepolstern«, in Ascaris 

 megalocephala and by myself ^ in Ascaris transfuga. In the last named 

 species they are three in number, one situated dorsally and two ven- 

 trally on the intestine just at the level where the mid-gut passes into 

 the proctodeum. 



From his article one is led to the conclusion that Professor 

 Spengel knows more about these peculiar giant-cells in Nematodes and 

 one cannot but regret that his only contribution to the increase of our 

 knowledge of these remarkable cells is one that has been so recently 

 described and figured in such well known periodicals as the Zeitschrift 

 für wissenschaftliche Zoologie and the Proceedings of the Zoological 

 Society. 



3. On the Notoohord of Cephaiodiscus. 



By Sidney F. Harmer, M. A. Cambridge. 



eingeg. 27. August 1897, 



Mr, A. T. Masterman has just published an important memoir ^ 

 on the anatomy of Actinotrocha and of Cephaiodiscus. If we may accept 



1 Durch Zufall erst am 12. Sept. in meine Hände gekommen. Carus. 



2 Zeitschr. f. wiss. Zool. Vol. LIV. 1892. p. 548. 



3 Proc. Zoological Society, London, 1894. p. 531, 



1 On the Diplochorda. 1. The Structure oî Actinotrocha. 2. The Structure of 

 Cephaiodiscus. Quart. Journ. Micr. Sc. Vol. 40. Part 2 (Aug. 1897). p. 281; following 

 on preliminary notices in Proc. Roy. Soc. Edinburgh, 1895 — 1896. p. 59, 129. 



