164 ANTHURID^. 



the first pair are large, and have the external branch 

 narrow, and attached so as to lie upon the outer margin 

 of the other, which is ovate and foliaceous ; the four 

 pairs next succeeding are ovate, membranous, and folia- 

 ceous. The posterior pair are articulated to the sixth 

 segment dorsally. The upper and outer branch is folia- 

 ceous, and affixed vertically ; the inner and inferior 

 branch is two-jointed, and placed horizontally below 

 the plane of the middle tail-piece, which is ovate, and 

 terminates in an obtusely pointed apex. 



There is a species of this genus, an inch in length, in 

 the Museum of the Jardin des Plantes, from Port 

 Western, New Holland. 



