66 GUIDE TO THE CORAL GALLERY. 



Case 3, capacious gullet animals that at first sight appear bigger than 

 Upright part, j^gg^f ^ 



The Ctenophora are now usually regarded as a distinct class of 

 Coelentera. 



Classification of Hydeozoa. 

 (From Prof. Lankester's Article Hydrozoa, Encydopcedia Britannica.) 



Class Hydrozoa. 



I 



Sub-clasB HydromeduBK Sub-class Scyphomedusaj 



I 



I I i I II 



Orders Gymnoblastea Calyptoblastea Trachomedusre. Narcomedusaj. Hydrocorallinse. Siphonopbora. 



or Athecata. or Thecaphora. 



[The Coelentera have been divided, in the various recent classifi- 

 cations, into two classes, Hydrozoa and Anthozoa ; into three, 

 Hydrozoa, Anthozoa, and Ctenophora ; or, again, into four, 

 Hydrozoa, Scyphozoa, Anthozoa, and Ctenophora.] 



