390 



STALK-EYED CRUSTACEA 



the telson a broad swimming fin ; the second seg- 

 ment in the male nearly always provided with genital 

 appendages. 



Section A. Porcellanodea. 

 Section B. Galathodea. 



Synopsis of the Sections and Families. 



I. Carapace ovate ; regions not well 

 marked. 



A. Front trilobed ; lobes short. 



a. First pair of legs broad ; walking 

 legs robust and of moderate length. 



a^. Antennules concealed ; antennal 

 peduncle directed backwards. 



a\ Abdomen applied closely to Y:.n.Wy Ponellanid^. 



thorax. — (Sect. Porcellanodea^ Family 

 Porcella?iidcu.) 



II. Carapace elongate; regions 

 well marked. 



B. Front produced into a pro- 

 minent and acute rostrum. 



b. First pair of legs elongated ; 

 walking legs long. 



b^. Antennules exposed ; an- 

 tenna! peduncle directed forwards. 



b^. Abdomen not applied closely 

 to thorax. — (Sect. Galathodea, Family 

 Galatkeidci.) 



Family Galafheidcr. 



