422 STALK-EYED CRUSTACEA 



smooth. The walking legs have upon the fourth and 

 fifth joint small spines. 



Range. — Barbados, St. Vincent, Grenadines, Dominica. 



Suborder III. Macroura. 



Macroura (part) . . . Latreille. 



Macroures (part) ... H. Milne Edwards. 



Macroura Dana, Miers. 



Macnira (part) .... Spence Bate. 



The external antennae very greatly developed ; the 

 internal antennae, usually terminating in two flagella, 

 have no fossettes. The external maxillipedes nearly 

 always pediform. Buccal cavity not distinctly defined in 

 front. Abdomen well developed, extending backwards, 

 with lamellar appendages beneath. Appendages to the 

 last segment but one large, laterally expanded, and 

 constituting, with the terminal segment, an expanded 

 swimming organ (telson.) 



Division I. Trichobranchiata. 

 Division II. Dendrobranchiata. 

 Division III. Phyllobranchiata. 



Synopsis of the Divisions. 



A. Gills in the form of threads. — {TricJiobrancJiiata?) 



B. Gills in the form of branching plumes. — {Bendj-o- 

 branchiata.) 



C. Gills in the form of broad, thin plates. — {Phyllo- 

 branchiata?) 



Division I. Trichobranchiata. 



Trichobranchiata . . . Spence Bate. 

 Gills more or less in the form of rounded threads. 



