Plate XVI. 



Spurilla hrasiliana MacFarland. 



Twelfth tooth of radula. x 116. 



First tooth of radula. x 116. 



Anterior end of foot in ventral view, the extruded 



mouth region showing above, x 5. 



Left salivary gland in side view, x 10. 



Right salivary gland in side view, x 10. 



Anal papilla, x 10. 



Median portion of typical tooth of radula. x 146. 



