EXPLANATION OF PLATE VIII. 

 (All figures after Clark.) 



SALENIA TUMIDULA Clark, p. 282 



1-3. Dorsal, ventral and lateral views, of a complete individual, 



(X2). 



4. Interambulacral area, (x4). 



5. Single plate of interambulacral area, highly magnified. 



6. Ambulacral area, highly magnified. 



7. Apical disk, enlarged. 



8. Genital plate, highly magnified. 



9. Tubercle much enlarged. 

 10. Oral opening enlarged. 



Vinccntown lime sand j Vinccntown. 



SALENIA BELLULA Clark, p. 283 



11-13. Dorsal, ventral and lateral views of a complete individual, 



(X2). 



14. Three interambulacral plates, highly magnified. 



15. Three ambulacral plates, highly magnified. 



16. Apical disk, enlarged. 



17. Tubercle, highly magnified. 



Vincentown limesand; Vincentown. 



896 



