NO. 13 coe: revision of the nemertean fauna 293 



PLATE 26 



Fig. 24. Baseodiscus ntexicanus. Photograph of living individual 

 taken at Saboga Island, Panama. Note great variation in po- 

 sition and width of transverse bands. Length about 1^ m. 

 Posterior extremity knotted and obscured by mass of mucus. 

 (Photo: Courtesy, Allan Hancock Expeditions.) 



Fig. 25. B. mexicanus. Anterior end of preserved individual ; ventral 

 surface, showing pattern of markings surrounding mouth. 



Fig. 26. B. 7nexicanus. Anterior end of preserved individual strongly 

 contracted. 



Fig. 27. Euborlasia hancochi. Anterior end of ventral surface, show- 

 ing mouth and proboscis opening. 



Fig. 28. E. hancocki. Anterior end of dorsal surface of large individ- 

 ual. 



