244 



quately describes would take to become perfectly mature. Eggs of the 

 kind he mentions can be found in abundance any day of the whole 

 year. From the fact that various stages of the ova are present at all 

 seasons Herr We her thinks it possible that the period of oviposition 

 is not limited to a special time of year. There is a possibility of this, 

 but he makes no mention of the important fact announced by me, that 

 after examining large numbers of specimens every month in a year 

 I found newly spent specimens only from November till March. The 

 Dutch zoologist has evidently paid no attention to the description I 

 gave of ovaries from which the ova had recently been discharged. He 

 repeats the suggestion of Steenstrup that the ripe females take on 

 another mode of life, but does not consider my suggestion that they 

 cease to feed, like many other fish. 



Finally Herr Weber says that my researches do not completely 

 elucidate the relations of the males, and that his results do not com- 

 pletely decide either for or against mine. My results, as Herr Weber 

 will find if he refers to my paper, were absolutely certain as far as 

 they went, and he adds nothing to them. He concludes his remarks 

 by calling attention to the importance of the fact that in Cyclo stornata 

 not only the female but the male genital products are expelled with- 

 out the intervention of genital ducts, a condition found otherwise only 

 in worms : as in the Muraenidae and Salmonidae the testis has a duct. 

 I Avas under the impression, like most other zoologists, that in the 

 Muraenidae vasa deferentia were absent, as in the Cycioafomata. On 

 the whole then I think it is proved that my results Avere not antici- 

 pated by W. Müller, and that Max Weber has not made a single 

 observation which modifies my conclusions in the least degree, ex- 

 cepting his statement of the date at which the Göteborg eggs were 

 obtained, and of the accuracy of this date he gives no evidence. 



Edinburgh, March 27, 1887. 



III. Mittlieiliiiigen aus Museen, Instituten etc. 



1. Notiz. 



Vielleicht ist manchen Fachgenossen ein J)ienst damit erwiesen, 

 wenn ich auf die neuen Wachsmodelle der verschiedenen pelagischen 

 Larvenformen aufmerksam mache, welche Herr Dr. Ziegler hier in 

 recht passender Auswahl und in vortrefflicher Ausführung angefertigt 

 hat. Die Serie von acht Typen ist Avohl geeignet, eine lebendige An- 

 schauung dieser Entwicklungsformen zu geben, und eignet sich gut, 

 sowohl zur Demonstration in der Vorlesung, als besonders auch zur 

 Aufstellung in einer Instituts-Sammlung. 



Freiburg!. Kr., J. April 1887. Weis mann. 



