= 
Wig. 1 
plastids primarily arranged in two layers, surrounding a: 
receiving cavity, the enterdn. Grade 1. Culentera. Enter 
which the enterdn remains as a continuous cavity either simple 
much I i al ylu 
MEDUSE. 4, HypRocoraLuine. 5, 0 
oo wel rar contain two orders, viz % 
er, Millepora). 2, Graptolitide (Graptolites). | 
The synopsis of the genera is thus formed by Mr. Moseley- 
Hypro-Coratiin® (Sub-order). a ; 
Hydroids forming a corallum with two kinds of zooids, 
uctylozooids with numerous tentacles. Ampulle a8 
Vol 
* Phylum is a term proposed by Haeckel instead of sub-kingdom™ 
