PLATE XXir. 



TUBULARIA ATTENUATA, TURUI.ARIA HUMILIS, TUBULARIA BeI.LIS. 



Fios. 



1 . Tubularitt (itlciiuala, a liytlrantli from a male colony, with its short erect clusters of gono- 



phoros ; magnified. 



2. A colony of Tiihidarki ntleniiata, natural size. 



3. Tiihnlaria liuwilis, a hydranth from a male colony, with its short erect clusters of gonopliores; 



magnified. 



4. A colony of TuhuJaria /nin/ilis, natural size. 



0. Tubnlaria Bellix, a hydranth from a female colony, with its erect clusters of gonopliores, in 

 some of which the actinuhne may be seen already developed ; magnified. 



n. A colony of Tnhularin Jicllis, natural size. 



