264 



Dr. R. M. Gunn on the 



observed, although the remarks made on the slides at the 

 laboratory as to the age of the ovum are also very valuable 

 as a guide. 



In this way J have examined preparations of the following 

 ova: — 



1. Gadus ceglefinus : 



2. Gadufy merlangus : 



9th -day after fecundation. 



3. Gadus morrliua : 



2nd day after emergence. 



4. Liparis Montagui '. 



'' March 11, 1885." ? Age. 



5. Gastrosteus spinachia : 



(1) About to emerge. ?4th week. 



(2) Later specimen. 



6. Cyclopterus lumpus : 



(1) " A Embryo." ? Age. 



(2) '' June 16, 1885." ? Age. 



(3) " No. I sHde." ? Age. 



(4) " July 2, 1885." ? Age. 



(5) Just emerged. (Several.) 



