NOTODELPHYS. 125 



segments bearing numerous long, finely plumose 

 setae. 



This sub-family contains only one genus Noto- 

 delpliys. 



Genus 1. NOTODELPHYS, Allman (1847). 



Body elongated, cephalo thorax somewhat depressed, 

 abdomen much attenuated, cylindrical ; caudal appen- 

 dages consisting of four large plumose setae attached 

 to the apex of each segment, together with two or 

 three small lateral setae. Anterior antenna3 com- 

 posed in the male of 10 or 11, in the female of 15 

 joints ; posterior unbranched, armed at the apex 

 with a strong movable claw and several curved seta3. 

 Mandible-palp 2-branched ; basal portion very large 

 and broad, internal branch composed of two, external 

 of two or more joints. Maxillae composed of a 

 prehensile or biting segment, which is provided with 

 strong curved setae, and three or four broad laminae 

 fringed with plumose branchial filaments. Anterior 

 foot- jaws stout, subtriangular, 5- jointed, the basal 

 joint constituting the bulk of the limb ; posterior 

 slender, 3- jointed ; both pairs armed with numerous 

 strong curved setse on the inner margin. Branches 

 of the first four pairs of feet 3-jointed and beset with 

 finely plumose setas ; fifth pair very small, 2-branched, 

 branches composed of one joint only. 



