ALTEUTHA. 299 



Hab. Berwick Bav ; Dover. 



Gen. 162. . AEPACTICUS, M. Edwards. 



Eoot-jaws forming strong cheliform hands; antennules 

 simple; ovary single. 



Aepacticus chelifer, Miiller, sp. — Thorax of four, the 

 abdomen of six, segments ; the last one ending in two long, 

 finely-serrated, bristles, fully the length of body. Head 

 beaked. 



Hab. Sea-shore, Berwickshire ; Kent. 



Akpacticus nobilis, Baird. — Three times larger than the 

 A. chelifer; the whole animal beautifully coloured with green, 

 red, and purple ; thorax large, rounded, of four segments ; 

 the body of six slender segments, the last bilobed and with 

 four setse, two long and two short. 



Hab. Berwick Bay, and Dover. 



Gen. 163. ALTEUTHA, Baird. 



Foot-jaws small, simple ; body flat. Fifth segment of 

 body with two strong falciform appendages. Dr. Baird 

 found the curious species on which he founded the genus 



