NO. 3656 COPEPODS—LEWIS pak 
Discussion.—The female Eniwetok specimens differ from Kabata’s 
original description (1966a, female only) in several respects: 
1. The length is less than that given for D. similis by Kabata 
(average of 2.18 mm for the Eniwetok specimens, 2.84 mm for Kabata’s 
two specimens). 
2. The pad associated with the maxillule is indicated by Kabata 
(p. 213) to have numerous delicate ridges. These were not clearly seen 
on the Eniwetok material although they may be visible with phase 
contrast. 
3. The minute process figured on the distal end of the spine associ- 
ated with the above-mentioned pad is not visible in the Eniwetok 
material. 
TaBLE 5.—Armature of thoracic legs I-IV of the female and male of Dissonus 
similis Kabata, 1966 
Inter- Exopodite Endopodite 
Leg Surface podal Protopo- 
Plate dite 
1 2 3 1 2 3 
I | Outer p fH 2fH, 2H c, 6el, Cl 
Inner m,p c 3P m 3P 
II | Outer m,p fm, fH fH emp) 22k c 3P 
m 
Inner m5, © Cre 12) 3P 12 ¢; 2P 3P 
III | Outer p fm, fH fH H, 2mp#, P | ¢ c ec, Cl 
m 
Inner P,m CHE Cee 4P iP C; 2. c, 4P 
IV | Outer p fm, fH fH np) @ c c, Cl 
m 
Inner P,m 5 12 (O51 c, 5P Je c, 2P. ec, 83P 
*Setule-like process with membrane along one side, naked on other side. 
#Setule-like process with membrane along both sides. 
4. Kabata indicates (table, p. 215) that there are 2 spines on the 
first segment of the exopodite of thoracic legs II-IV although he figures 
only a single spine (figs. 2p—r). The Eniwetok specimens posses only a 
single spine on this segment in these legs. 
5. Kabata indicates (table, p. 215) the presence of plumosities on 
the inner surface of the third segment of the exopodite of the third 
thoracic leg. The Eniwetok specimens did not exhibit this. 
6. The Eniwetok specimens posses plumosities on the inner surface 
of the third segment of the endopodite of the fourth thoracic leg. 
These are not listed in the original description of D. similis. 
Kabata also indicates (p. 213 and fig. 14) that the ‘eye spots” are 
what the present author is comparing with the conspicilla of Nesippus. 
Kabata apparently failed to see the true ocular region lying below the 
