480 EYCLESH VMER. 
EXPLANATION OF FIGURES. 
All figures drawn from living eggs X about I5. 
Fics. 1-18 represent eggs of Acris, in stage of neural fold, viewed from the 
anterior end. 
Fics. 19-40 represent eggs of Acris, viewed from the posterior (blastoporic) 
end. 
Fics. 41-56! represent eggs of Bufo, in stage of early neural fold, dorsal 
aspect. 
Fics. 59, 61, 63 represent eggs of Amblystoma, in stage of second cleavage, 
viewed from upper pole. 
Fics. 60, 62, 64, 66, 68, 70, 72, 76, 80, 83 represent eggs of Amblystoma, in 
stage of early neural fold, dorsal aspect. 
Fics. 65, 67, 69, 71, 73-75, 77-79, 81, 82, 84-98 represent eggs of Amblystoma, 
viewed from posterior (blastoporic) end. 
1 Owing to necessary changes in arrangement of figures, Nos. 57, 58 were omitted. 
