158 BRITISH COPEPODA. 



It is, indeed, difficult to say with any degree of cer- 

 tainty what species Goodsir had in view, his written 

 and engraved descriptions being altogether inadequate. 

 On this account I venture to propose a new specific 

 name, Goodsiri, for the form here referred to. 



Genus 30. PBLTIDIUM, Philippi (1839). 



(Alteutha, Baird, 1845. Carillus, Goodsir ; Sterope, Goodsir (in part), 



1845.) 



Body depressed, incised between the segments, ovate 

 or subovate, abdomen not distinctly separate from the 

 cephalothorax ; integument very strong and thick ; 

 caudal segments and setae short. Anterior antennas 

 shorter than the first body-segment, 9-jointed, slender 

 and tapered in the female, in the male knotted and 

 clawed at the apex ; posterior antennae 4-jointed, a small 

 2-jointed secondary branch attached to the apex of the 

 second joint. Mandibles minute, basal joint of the 

 palp expanded distally, and bearing two 1 -jointed 

 branches, the innermost of which is the longest ; each 

 branch as well as the base bears three setae, and the 

 longer branch has also a small lateral uni-setiferous 

 digit. Maxillae very small ; palp much larger than the 

 masticatory portion, composed of a basal joint and 

 three setiferous segments, the middle being the largest, 

 clawed at the apex, and provided with a short lateral 

 setiferous process. First pair of foot-jaws laterally 



