inL dl 



ml dl 



o hm 5P 



vhm rad ''aa lo 



vhin md dn 



12 



Figs. 9 and 10 Camera drawings of stages 36 and 37-38, showing further de- 

 velopment of lateral-line primordia. X 10. 



Figs. 11 and 12 Camera drawings of lateral and ventral views, respectively, 

 of stage 46+, showing final distribution of lateral-line groups of sense organs. 

 The gills have been removed. X 10. For abbreviations see page 430. 



432 



