92 



MR. J. A. LIDDELL ON A PARASITIC COPEPOD 



Tabulation o£ Generic Characters of : — 



Body 



Anal opercle. 

 Caudal rami, 



Kostruiu ... 

 Ant. I 



Ant. II. 



Mandible 



Maxilla I. ... 



Maxilla II. . 



First pair of 

 legs. 



Natatory 



Last pair 



Nitocra. 



Slender, cylindric. 

 Coarsely spinulose urosome. 



Denticulate at edge. 



Short and covered with 

 spiuules. 



Very small, narrow, conical. 



Moderate size, 8-articulate, 

 densely fringed with setaj ; 

 last two joints not very 

 reduced. 



Outer ramus short, uniarti- 

 culate, dilated distally. 



Palp biarticulate, basal joint 

 slightly dilated. 



Nitocrameira. 



Ameira. 



Slender, somewhat compressed A. 



anteriorly. 

 Practically smooth urosome. A. 



Smooth. 



Short, almost smooth. 



Small, narrow, conical. 



Slender, somewhat com- 

 pressed anteriorly. 



Less spinulose than 

 Nitocra. 



A. Smootli. 



A.i Short, scarcely spinu- 

 j lose. 



N.: Almost obsolete. 



Moderate size, S-articulate. j Last two joints very 

 densely fringed wiih bristles ; j small, not well de- 

 last two joints distinct, N. fined. 



Outer rauuis short, uniarticu- Outer ramus uniarticu- 

 late, dilated distally. N, late and narrow. 



Palp biarticulate, basal joint 

 slightly dilated. N. 



Maud, palp more de- 

 veloped, basal joint 

 dilated into a seti- 

 ferouB expansion. 



Three lobes inside jaw-like Three lobes inside jaw-like j Two lobes inside jaw- 

 portion, portion. N. like portion. 



Two setiferous lobes inside 

 terminal claw-bearing part. 



A single claw-bearing lobe, 

 inside claw-bearing part. 



Rather strongly built, dis- ' Somewhat more slender than 



tinctly prehensile. Inne 

 ramus 3-articulate, with 

 outer two joints more or 

 less bent on inner. 



Nitocra. Inner ramus much A. 

 longer than outer, 3-articu- 

 late, last joint as long as 

 first. 



Rather fully developed, with i Well-developed ; both rami 3- 

 inner ramus of all dis- articulate, inner not trans- 

 tinctly 3-articulate, and j formed in male, 

 not transformed in male. 



Distal joint compressed. 

 Large inner expansion of 

 proximal joint fairly pro- 

 duced. 



Distal joint long and com- 

 pressed. Inner expansion of 

 proximal joint not much 

 produced. 



Male much less reduced in 

 comparison than either 

 Nitocra or Ameira. 



Only a single lobe (seti- 

 ferous) inside the ter- 

 minal claw - bearing 

 part. 



Distinctly prehensile, 

 but more slender than 

 Nitocra. Inner ramus 

 much longer than 

 outer and distinctly 

 3-articulate. 



Both rami well develo- 

 ped, 3-articulate, inner 

 not transformed in 

 male. 



Small distal joint, more 

 or less contracted dis- 

 tally. Inner expan- 

 sion of pro.'cimal joint 

 not much produced. 



Letter N denotes resemblance to Nitocra. 

 Letter A denotes resemblance to Aincira. 



