448 



which is composed of eight segments. The eight pairs of thoracic 

 appendages may have an exactly similar shape, and possess two 

 separate and many- jointed rami. This form of thoracic appendage 

 is characteristic of the Schizopoda ; in Nebalia* the thoracic appen- 



li 



Fia. 3r5. JfeLulia Groffroyi, strongly magnified, i. Female; f>, male; S, rostrum; 0, 

 stalked eye ; M, crop ; D, intestine ; S, shell G, vas defcrens. 



* Kcbalin is best placed in a special group, Leptostraca, between the Entotnos- 

 traca and Nalaco&traca. The palaeozoic fossil genera llymvnocaris, Pcltocaris, 

 etc., would have to l>e placed in such a group. 



