342 STALK-EYED CRUSTACEA 



extended, not folded under the thorax, with four pah's of 

 appendages in the female. Sterna of the thoracic legs 

 fused to form a ventral shield, which is wide anteriorly. 



External maxillipedes moderately elongate. Eyes 

 placed in orbits ; internal antennae not furnished with 

 special fossae, and placed to a certain extent behind the ex- 

 ternal antennze. Vasa deferentia protruded in the males. 



Range. — West Indian Sea, Bahia, Australia, Amboia, 

 Ki Island, Fiji Island, Borneo, Japan ; in rock-pools, or 

 deep water. Some may be found in' the sand near tide- 

 mark. 



Only one family. 



Family Raninidae. 

 Raninidce .... Dana, Henderson. 

 Characters the same as the group. 



Synopsis of the Genera. 



A. External maxillipedes with third joint 

 longer than the fourth. 



a. Fronto-orbital border slightly narrower 

 than the carapace at its middle, with a tri- ^cps, 

 angular rostrum. 



a}. Orbits well defined — {Rani/iGidcs.) 



b. Fronto-orbital borders less than half 

 the width of the carapace. 



b^. Orbits ill defined. — (Znndifer.) 



I. Raninoides. 



Raiiinoidi's . . H. Milne Edwards, Dana, Henderson. 



Carapace convex from side to side. Fronto-orbital 

 border horizontal, slightly narrower than the carapace at 



