Fic.296 AU, GS 
op 
ee 
Meseesics ee NEE / : 
ee 
Figs. 296-302. — Larval sturgeons. (All but Fig. 302 after KUPFFER.) Fig.299, X 18; 
296-300, X 10; 301, X 8; 302, X 4. (Enlargement approximate.) 296, 297. Larvae — 
shortly after hatching. 298. Larva two days old. 299. Mouth region of larva of third — 
day. 300. Larva of fourth day. 301. Larva of twenty-eight days. 302. Sturgeon es 
twelve months. 
A, Anus. AU, Auditory vesicle. B. Barbel. GS. Gill slit, A. Heart. OZ. or } 
factory pit. OP. Optic vesicle. PF, Pectoral fin, PN. Pronephros, 5S. Mouth pit, — 
SP. Spiracle. 
222 
