PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. [1885. 



EXPLANATION OF PLATE XIX. 



• (Turbiuella pyrnui, Lamarck, p. 34r)-,'?47. ) 



Fig. 1. Teeth, rachidian, and laterals. 



Fig. 2. End of sipbonal fold, the right mantle edge cut away to show the internal 



fold ; natural size. 

 Fig. 3. End of proboscis, from above; natural size. 



Fig. 4. Extremity of left tentacle, as contracted in spirits, showing eye, enlarged. 

 Fig. 5. General form of radula, greatly magnified. 

 Fig. 6. Turbiuella pyrum. Lam., crawling, one-half natural size. Restored from an 



alcoholic specimen. 



