FIG. 284 



287 



Figs. 284-289. — Larval sharks. (Figs. 284-287 after BALFOUR.) 284. Pristiurus 

 (embryo, X 5) with yolk sac (X 2). 285, 286. Larvae of ScylUian. X 4. 287. Ventral 

 view of head of larval Scyllium, slightly younger than that of last figure. X 8. 288. Larva 

 of Acanthias. X 4. 289. Late larva of Acanthias. X |. 



G. Gills. GS. Gill slits. PF. Pectoral fin. SP. Spiracle. Y. Yolk sac. VS. Stalk 

 of yolk sac. 



216 



