28 BRITISH COPBPODA. 



Genus 8. AMYMONE, Claus (1863). 



Body much compressed. Dorsal margin very con- 

 vex. Head and last thoracic segment very large, pro- 

 duced ventrally and approximating so as to give a 

 more or less circular outline to the animal. Abdomen 

 very short. Head united with the first thoracic 

 segment. First pair of antennae elongated, 6- or 8- 

 jointed; second pair 3-jointed, and bearing a small 1- 

 or 2-jointed secondary branch, last joint clawed. 

 Mandible-palp 1-branched;* maxillar palp elongated, 

 2-jointed. First foot-jaw slender, 3-jointed; second 

 much elongated, 2-jointed, and forming a strong 

 grasping hand. First pair of feet not prehensile, 2- 

 branched, each branch consisting of a single joint; 

 second, third, and fourth pairs with both branches 

 3-jointed. Fifth foot in the female composed of two, 

 in the male of one, joint. Integument excessively 

 tough and coriaceous, usually cellular or areolated. 



1. AMYMONE SPH.EEICA, Claus. PI. XLIX, figs. 1 11. 



Jmymone sphriceea, Claus. Die frei-lebenden Copepoden, p. 114, 

 t. xx, figs. 19 (1863). 



Boeck. Oversigt Norges Copepoder, p. 32 



(1864). 



falcata, Norman. Brit. Assoc. Report, p. 296 (1868). 



* Boeck says fao-branched a mistake, unless his specimens belong 

 to a different species from those here described. The statement of the 

 same author as to the structure of the second and third pairs of feet 

 is also erroneous (" outer branch 2-jointed, inner 3-jointed ") both 

 branches being always 3-jointed. 



