FOURTEENTH ANNUAL MEETING. 59 



As a rule, a transplanted animal does either better or worse 

 than if left in its native place, especially if carried to a con- 

 siderable distance. The brown trout, Salmo fario, of Europe, 

 grow rapidly here, while our eastern trout, Salvelinus foniinalis, 

 have made rapid growth in Germany. The German carp is an- 

 other instance of rapid growth after transplanting, for in Amer- 

 ica they have far exceeded their growth in their native land. I 

 do not know the history of the black bass in Saratoga and Eff- 

 ner lakes, to which Mr. Cheney refers, and which he claims 

 stocked the Hudson. I have been under the impression that the 

 first black bass in the Hudson river came down the Erie canal 

 when it was opened, some fifty years ago ; but they have never 

 increased much below Trov durin^ this time. 



ON SOME OF THE PROTECTIVE CONTRIVANCES 



DEVELOPED BY AND IN CONNECTION WITH 



THE OVA OF VARIOUS SPECIES 



OF FISHES. 



BY JOHN A. RYDER. 



Mr. President and Gentlemen : A discussion of the ap- 

 paratus by means of which the ova of fishes are protected will, 

 I think, be of interest to the members of this society. I will 

 roughly classify the eggs of fishes into four divisions, and call 

 one of the groups " buoyant eggs," another "adhesive eggs," an- 

 other "suspended eggs," and the fourth "transported eggs," 

 the latter class embracing such as are hatched in the mouth or 

 in receptacles especially developed on the outside of the ab- 

 domen or under the tail of the parent fish — usually the male — 

 in nests built by the males, or viviparously developed in the 

 ovary of the oviduct of the mother. 



The ^^^ of the cod will serve as the type of the first group. 

 It is without an oil-drop, but is buoyant notwithstanding. There 



