76 BRITISH COPEPODA. 



Donegal. Female specimens only have been ob- 

 served. 



3. LAOPHONTE THORACICA, Boeclc. PI. LXXVII, figs. 1 



8. 



Laophonte thoracica, Boeck. Oversigt Norges Copepoder, p. 54 



(1863). 

 Tetragoniceps longiremis, B. & R. Brit. Assoc. Report, p. 196, 



(1875). 



Female. Body elongated (fig. 1), subsigmoid when 

 seen laterally, posterior dorsal angles distinctly but 

 not very strongly prominent, margins denticulated; 

 head united with the first thoracic segment, no ros- 

 trum; caudal segments very slender, distant, about 

 twice as long as the last abdominal ring ; principal 

 tail seta rather longer than the abdomen ; second 

 abdominal segment (fig. 8) produced laterally, the 

 angles rounded and densely ciliated; third segment 

 (fig. 8) also produced, but angulated and armed with 

 two lateral spines ; fourth segment not produced, setose 

 at the angle. Anterior antennas (fig. 2) slender, about 

 as long as the cephalic segment, 6-jointed, the joints 

 having the following proportionate lengths : 



1, 2, 3,__4^__5, 6. 



8 "ll 8 l'i ij 5 



Secondary branch of posterior antenna (fig. 3) very 

 small, 4-setose. Second foot-jaw (fig. 4) excessively 

 long and slender, the hand almost linear and the 

 terminal claw very long. First pair of feet (fig. 5) 

 very long, peduncle long, slender, and biarticulate ; 



