56 WESLEY R. COE. 



EXPLANATION OF PLATE IV. 



FIG. 9. N ectonemertes grimaldii Joubin. Male. Sketch of living animal, 

 showing tentacles of medium size. X iK- (After Joubin, '06.) 



FIG. 10. Balcenanemertes chuni Biirger. Sketch of male after preservation, 

 showing the rudimentary tentacles (t) and the genital papillae (sp) on which the 

 sperm ducts open. X 8. (After Burger, '09). 



FIG. ii. N ectonemertes chavesi Joubin. From photograph of male with rudi- 

 mentary tentacles (/). The spermaries (sp) are indicated on each side of the head. 

 X 5. (After Joubin '06.) 



FIG. 12. Pelagonemertes rollestoni Moseley. Adult male, with a single group 

 of five or six closely placed spermaries (sp) on each side of the head; p, partially 

 extruded proboscis; m, mouth; br, brain; in, intestine; id, intestinal diverticulum; 

 In, lateral nerve. X 3. (After Burger, '09.) 



FIG. 13. P. rollestoni. Female, showing the four or five ovaries (ov) on each 

 side, each with from one to three ova; ro, rhynchodeal opening; other lettering 

 as in figure 12. X 8. (After Burger, '09.) 



