i 4 6 



MANUAL OF ZOOLOGY 



SECT. 



the surface of the extremity is sometimes abundantly 

 provided with stinging-capsules ; sometimes it is beset with 

 glandular adhesive papilla. The proboscis is capable of 



long.nc 



dir 



FIG. 79. Diagram of the organs of a Nemertine, from below, a, anus; br, brain; 

 div, coeca; long, nc, longitudinal nerve-cords; tn, mouth; , nephridia; ov, 

 ovaries; pr, probosis. (After Hubrecht.) 



being retracted within the interior of an investing sheath, 

 the proboscis sheath. 



