Emhryology of the Reliaa of Teleosteans. 265 



7. Anarrhichas lupus '. 



Many specimens examined, marked " January," Feb- 

 ruary," " March," "April," " May," "June." 



8. Molva vulgaris : 



(1) "May 8th." ?Age. 



(2) "May 10th." 



9. Trigla gurnardus : 



(1) 4th day after fecundation. 



(2) 13th „ ,, ,, 3rd day out. 



(3) 6th ,, ,, emergence. (Several.) 



(4) "June 30th, 1886." ?Age. 



(5) " July 25th." ? Age. (Several.) 



10. Cotl us J ? sp&cies : 



(1) "April 6th, 1886." ?Age. 



(2) " April 7th, 1886." (Several.) ? Age. 



(3) "April 13th, 1886." ? Age. 



(4) "April 14th, 1886." ? Age. 



11. Pleuronectes jlesus : 



(1) 9th day after fecundation. 



(2) 10th „ „ 



(3) 11th „ „ hatching (?). 



(4) "May 18th, 1886." ? Age. 



(5) "June 18th, 1886." ? Age. (Several.) 



I also examined ova of Salvio saJar at the following stages: — 



(1) 40 days after fecundation. 



(2) 1st day after emergence. (Several.) 



(3) 13th „ „ 



(4) 45th „ „ 



Very briefly, my conclusions may be stated as follows : — 

 The first appearance of the Teleostean eye consists in a 

 solid outgrowth from the brain, which latter is at this stage 

 itself also solid, and both structures are formed of cells similar 

 throughout. 



Ann. & Mag. N. Hist. Ser. 6. Vol. ii. 18 



