Plate 10 



Figs. 1-3. Diplonotos striatum, new species (p. 31). 



1. An entire colony and a fragment, natural size. The branches 



show noncellular faces for the apertures are arranged 

 laterally. 



2. Noncellular surface, X 20, with sulci of little depth. 



3. Lateral cellular side of branch, X 20, in which the enlarged 



portions bear salient transverse vibices. 

 Albatross Station D. 3408. 

 4-8. Semihaswellia sulcosa, new species (p. 15). 



4. Colony, natural size. 



5. 6. Frontal cellular side, X 12 and a portion, X 20, showing 



the longitudinal sulci. 

 7, 8. Dorsal side, X 12 and X 20, with longitudinal sulci and 



very small vacuoles. 

 Albatross Station D. 3408. 



71 



