Pipefish blastoder Figs, , PI. I., thei 



a reversion to a type of segmentation esse;; 

 ia. 



Thirty-two-celle 



of this sta - ig. 23, PI. I , , 



were founc thirty percent of one lot o: 



sparingly in all ot] ig. 3 is plain 



ivative of forms Like Figs, it 



normal, is noticeably differe: L r "ilson's 

 figures o for Serranus (Figs. 6,8, 9, a 



; T o section of this stag r± - . Its internal stru- 



cture wil] j reference t . • -', PI. II., a 



sixteen- celled blastoi divide into 



,wo central cells will divide horizontally, the two 1 

 al ones by an oblx - suiting in six surface and two 



interior cells. ( ilson's Fig, 



- . - . '1. III. is a section 



. d ignificati 



others. It serves to show the inequalities in the 



- f the blastoderms. The 

 flattened above, though retain- rounded 



right the section cuts the point of a sixth c< 



