L\TROD UL 7Y6W. 7 



is the relation of the species examined by me to that 

 found at Naples, which furnished Kowalevsky with 

 his material. My special reason for doing this is the 

 hops that some differences in our investigations, minor 

 though they be, may be found to have their origin 

 in variety of species. 



The Amphioxus of Faro is undoubtedly different 

 from that of Naples. I have, it is true, not extended 

 my investigation to the characteristic details of the 

 full-grown animals ; and therefore I can only give the, 

 general impressions received when occupied with 

 them. 



Dr. Eisig, who paid me a visit at Faro in June, 

 1879, examined the Amphioxus found there, and re- 

 marked that it differed from the Neapolitan type in 

 its considerably larger size and the stronger develop- 

 ment and protuberance of its sexual organs. 



I have observed myself that the specimens of 

 Amphioxus at Faro are, during spawning time, found 

 almost always of equal size, and distended with sexual 

 products. It is only seldom that any are to be found 

 at all smaller and without the sexual parts fully 

 developed, and these too are only shorter than the 

 full-grown specimens by one-third. 



