aLASStFlCATlON OF gtenophobes. 



95 



Order 2. Saccat<s. — Body more or less spheTiciil, with two long tenta- 

 cles capable of being wholly retracted in a sac (Pleuro- 

 brachia). 



Order 3. Tmniata. — Body ribbon-like, being very much compressed in 

 the direction of the lateral diameter (Cestum). 



Order 4. Lohatm. — Body lateral, compressed, bilobed (Bolina). 



View of the Classification of the Ctenophoea. 



Ldbata. 

 (BoJina.) 



T(eniata. 

 (Cesium.) 



Saccata. 

 (Pleurobrachia.) 



Euryslomem. 

 rfdyia.) 



Ctenophoka. 



Laboratory TFo?-^.— The Ctenophorae should be studied while alive. 

 They may be collected with a drag or tow-net from a boat when the 

 surface of the ocean is calm. For studying the fine anatomy and 

 tissues they should be treated by the same methods as the smaller jelly- 

 fishes. 



