PLATE X 



Ceratocymba dentata, whole animal. 'Discovery II' St. 2635 



Fig. i . View showing the right side of the anterior nectophore and the 

 ventro-left lateral aspect of the posterior nectophore, showing the 

 remarkably long cylindrical nectosac of the posterior nectophore, 

 and the obsolescent one of the anterior, x 2. 



Fig. 2. View showing the dorsal side of the anterior nectophore and the 

 right side of the posterior nectophore. x 2. 



Fig. 3. View showing the left side of the anterior nectophore and the 

 ventro-right lateral aspect of the posterior nectophore, showing the 

 elongated left ventral tooth. Eudoxid groups can be seen in the 

 hydroecium of figs. 1-3. x 2. 



Fig. 4. Basal view of the animal showing the ostium of the nectosac of 

 the posterior nectophore and its surrounding teeth. In the back- 

 ground parts of the anterior nectophore are seen. In the foreground 

 above can be seen the left dorsal ridge of the posterior nectophore 

 running down to join the left dorsal tooth, and on the left the right 

 dorsal ridge running down to the right dorsal tooth, leaving the 

 median dorsal tooth free. Below are the bases of the two ventral 

 hydroecial wings, x 4. 



Fig. 5. Basal part of the posterior nectophore to show the oblique 

 flattened facets, the left-hand one bearing a double fringe of spines, 

 at the base of the ventral hydroecial wings, x 3-5. 



