580 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



FIG. 643. CYLPEONISCUS MEINERTI (AFTER GIARD AND BONNIER), a, POSTERIOR PART, VIEWED DOR- 

 SALLY, OF EMBRYO OF FIRST STAGE. X 240. 6, LATERAL VIEW OF EMBRYO. X 240. C, VENTRAL 

 VIEW OF EMBRYO. X 420. d, SIXTH LEG. X 580. C, POSTERIOR EXTREMITY. X 580. /, FIFTH 

 LEG. X 580. 



