JOURNAL OF MICROSCOPICAL SCIENCE. 



EXPLANATION OF PLATE XII, 



Illustrating Mr. Ray Lankester's papers on " A new 

 type of Infusoria," and on " The Heart of Appen- 

 dicularia furcata" 



Figs. 



1—3. — Torquatella typica ; three specimens, c. Capitular prominence or 

 upper lip over-hanging the mouth. 



4. — The same, a side view of another specimen, as seen swimming. 



5. — The same; another specimen seen from above. 



6. — Heart of young Appendicularia furcata. 



7.— Heart of a full-grown specimen. *. Secondary corpuscles. 



8. — One heart-cell, with out-growing fibrillae ; from another specimen. 

 s. Secondary corpuscles. 



