PLATE XVI. 

 Spurilla brasiliana MacFarland. 



Fig. 83. Twelfth tooth of radula. x 116. 



Fig. 84. First tooth of radula. x 116. 



Fig. 85. Anterior end of foot in ventral view, the extruded 



mouth region showing above, x 5. 



Fig. 86. Left salivary gland in side view, x 10. 



Fig. 87. Right salivary gland in side view, x 10. 



Fig. 88. Anal papilla, x 10. 



Fig. 89. Median portion of typical tooth of radula. x 146. 



