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. Larvas of Scyllium. 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. PP. Pectoral fin. SP. Spiracle. Y. Yolk sac. VS. Stalk 

 of yolk sac. 



216 



