314 J THE AMERICAN NATURALIST.  [Vot. XXXV. 
Tubularia tenella Ag. 
(Thamnocnidia tenella. Ag.) 
Trophosome: Colony very small, rarely exceeding a height of one and 
one-half inches. Stem loosely branched and with indefinite annulations. 
Hydranths with tentacles about as in former. 
Gonosome: Compare T. larynx. Color and habitat much as in last. 
Fic. 12. — Single hydranth 
enlarged. 
(After Agassiz.) 
Fic. 14.— Hydranth with pendulous 
gonophores. 
Fic. 13. — Tubularia crocea Ag. 
