136 BRITISH PARASITIC COPEPODA. 



The frontal end of the cephalic segment and the second 

 and third abdominal segments as well as the furcal joints 

 have the dorsal surface covered with fine spinules. 



Antennules short, stout, and six-jointed, resembling 

 those of Euclactylina acanthii. The fourth joint very 

 distinctly shorter than any of the others. The second 

 joint furnished with a single stout curved spine. 



Antennas also similar to those of Euclactylina acanthii, 

 except that the inner margin of the second joint is 

 produced into two short teeth, and the terminal claw 

 is much stouter. 



Mandibles and maxillge somewhat rudimentary in 

 structure and very similar to those of Euclactylin 

 aacuta. 



The first pair of maxillipeds resembling those of the 

 other members of the genus in general appearance, but 

 the end joint is narrowly ovate in shape and its inner 

 margin is furnished with a row of fine teeth. Terminal 

 claw slender. The second pair of maxillipeds large and 

 strong, and forming powerful chelae. They are nearly 

 similar in structure to those of Euclactylina. minuta. 



The first pair of feet biramose. Both branches 

 short, stout, and two-jointed. The second joint of 

 each branch much shorter than the first. The armature 

 of the joints similar to that of the first pair of Euclacty- 

 lina minuta. The second pair of feet decidedly different 

 from the second pair of the other members of the 

 genus known to us. Inner branch very short and three- 

 jointed. Outer branch also three-jointed but having a 

 distinctly uncinate appearance and being about three 

 times the length of the inner branch. The first joint of 

 the outer branch large and swollen ; equal to four times 

 the combined length of the second and third joints. 

 The second joint short and wide. The outer margin 

 produced into a bluntly-rounded point. The third 

 joint very short and narrow, and appearing to be 

 loosely articulated to the second joint. It requires 

 some care to detect it, as it appears to be easily folded 

 over the surface of the second joint. The outer margin 



