THE EARLY DEVELOPMENT OF AMIA. 415 
practically ended. Indeed, so late was the time of my arrival 
at the spawning ground that it was altogether due to the kind- 
ness and skilful efforts of Mr. Henry Meyer, of Oconomowoc, 
that my trip proved successful. I found it impossible, accord- 
ingly, to secure at the same time both male and female fish in 
spawn for purposes of artificial fertilisation, and I was unable 
to employ the method of caring for the eggs which had proved 
so helpful in the studies of Acipenser and gar-pike. Fortunately 
the eggs of Amia were found to be especially hardy ; they 
might be removed from the nests and retained in floating hatch- 
ing cases, often even kept in the laboratory in pans and trays 
without serious losses. From their adhesive membrane, how- 
ever, | have no doubt that the same method of procedure would 
have succeeded as in the case of the other Ganoids. In fixing 
the eggs, alcoholic (50 per cent.) picro-sulphuric mixture was 
generally used. 
As to the general habits of Amia, but little need be said in 
the present paper; the notes of Dr. Fiilleborn’ regarding 
them have been fully confirmed. The fish is especially abundant 
in the Wisconsin lakes, and as it is worthless as food, and 
persists in taking any and all baits, it isnot looked upon kindly 
by the local fisherman—especially as it not infrequently breaks 
both his rod and line. Luckily for him, perhaps, it feeds mainly 
during the evening and night,—but even then he meets it con- 
tinually when using the jack-light. The strength and apparent 
clumsiness of the fish are to be emphasised ; when disturbed in 
the shallows it will break through the water noisily in its 
strong efforts to escape. 
The themes of the present paper have been arranged as 
follows : 
1 1895, Fiutezorn, “ Berichte tiber eine zur Untersuchung der Entwicke- 
lung von Amia, Lepidosteus, und Necturus unternommende Reise nach 
Nord-America,” ‘Sitzungsberichte der Akademie der Wisseuschaften zu 
Berlin,’ Bd. xl, ss. 1057—1070. 
