448 



CRUSTACEA. 



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- 



l-'ic. 355.Neba/ia Geoffroyi, strongly magnified, a, Female; I, [male ; S, rostrum; O, 

 stalked eye ; M, crop ; D, intestine ; S, shell (?, vas deferens. 



* Xclalia is best placed in a special group. Leptoxtntru, between the Enttmiox- 

 trtn-it and Malacostraca. The palaeozoic fossil genera Hymenocaris, Peltucurix. 

 etc., would have to be placed in such a group. 



