THE ANTHOZOA 



29 



they appear to be borne directly by the mother zooid, do not conmumicate 

 directly with the cavity of the latter, but secondarily by means of solenia, 

 which ramify in the greatly thickened mesogloea of the walls of the 

 mother zooid. The branch thus defined includes forms which have 

 hitherto been classified with the Cornulariidae, and are, in truth, not 

 easily separable from that family. But they exhibit, in their mode of 

 budding and in the disposition of the secondary zooids around a central 

 zooid, characters which nuirk them off distinctly from their nearest 



Fig. XV. 



1. — Portion of a colony of Cari.joa arhorea, Wri^'ht ;imi1 StuiliT. About one-tliird natural size. 



2. — Portion of stem of Telesto arborea. Magnitii'd, showing; llio zooids. 



3. — Extremity of branch of Coelogorgia. Ma^jnilii'ti, showins tlm zooids. 



4. — Coelogorgia palmnxa, M. Edw. Portion of a colony about one-third natural size. 



5. — Spicules of Coeicigorgia. 



(1 and 2 after Wright and Studer; 3 to 5 original.) 



Cornularian allies, and they appear to lead on to the well-defined group 

 of the Pennatulacea. 



Section 1. Asiphonacea. Characters — Colony erect, simple, or branch- 

 ing, consisting of an elongated, axial zooid with thickened walls containing 

 solenia, from which secondary zooids are formed. Skeleton in the form 

 of dentate discs or warty spindles ; a horny or calcified axis absent. The 

 cavity of the axial zooid is not divided by a partition. 



Family 1. Telestidae. From a membranous or ramifying stolon 

 individual Clavularia-like zooids, the body walls of which contain solenia, 

 arise. Certain of these grow out to form long zooid tubes, or axial zooids. 



