54 WESLEY R. COE. 



EXPLANATION OF PLATE III. 



FIG. 5. Pelagoner merles brinkmanni, new species. Outline of body of male, 

 showing the spermaries (sp) situated on the anterior margin of the head. The 

 digestive and nervous systems are also shown; i, intestine; id, intestinal diver- 

 ticulum; r, rectum; In, lateral nerve; cf, caudal fin. X 6. 



FIG. 6. Outline of body of female of same species, showing the six pairs of 

 ovaries (ov), each with usually a single large egg. X 6. 



FIG. 7. Anterior portion of body of same species, showing the five ovate 

 spermaries (sp) which open on the anterior border of the side of the head; the 

 genital openings here lie close together on blunt papillae, but in some cases are more 

 widely separated, due to different contraction of the adjacent tissues; m, mouth; 

 st, stomach; id, intestinal diverticulum; py, pylorus. X 12. 



FIG. 8. Nectonemertes mirabilis. A mature spermary, showing its thick 

 muscular layer; sv, thin-walled seminal vesicle; gp, genital papilla. X 60. 



