457 



Fig. 1. 



ibe^'-l 



VaSTiqi 



iteg'- 



Fig. 1. Geonemcrtes agricola. Transverse section of body containing nearly mature 

 embryos. One embryo appears on each side of intestine [in] in its cliaracteristic 

 position, -with both head and tail directed toward ventral side of parent's body; 

 vg.prb, proboscis sheath; n.l, lateral nerve; va.sng.l, lateral blood vessel; gl.ee', 

 cephalic glands of embryo ; in', endodermic mass which later forms intestine ; ch'. 



brain, iteg', integument, and prh', proboscis of embryo, x 70. 

 Fig. 2. Geonemertes agricola. Transverse section of body, showing crowding of 

 embryos when nearly mature and their encroachment on the space usually occupied 

 by intestine [in] and proboscis sheath [vg.prb). Sections of 4 embryos are repre- 

 sented, all of which have their heads directed toward ventral side of parent's body; 

 iteg, integument; tnu., muscular layers, which are much distended by growth of 

 embryos. Other reference letters as in Fig. 1. x 70. 



