VISUAL CELLS IN AMBLYSTOMA 503 
Fig. 7 Double cone, single cone, and four rods from the retina of a larva of 
26 days following tail-bud stage. X 1040. 
Fig. 8 Double cone, single cone, and three rods from the retina of a larva of 
31 days after tail-bud stage. X 1040. 
Fig. 9 Double cone, single cone, and two rods from the retina of a larva of 
36 days following tail-bud stage of development. X 1040. 
Fig. 10 Double cone, single cone and two rods from the retina of a larva of 
40 days following tail-bud stage of development. X 1040. 
