NO. 3656 COPEPODS—LEWIS 5 
Discussion.—The single male specimen from Eniwetok differs from 
the diagnosis of the genus given in Yamaguti (1963) in the following 
characteristics: 
1. The lateral extensions of the second to fifth pedigerous segments 
are not as large. 
2. The antenna is 4-segmented, not 3-segmented. The condition 
exhibited in the third and fourth segments of the antenna of the 
Eniwetok specimen suggests that the terminal segment of the antenna 
of previously described species may be composed of 2 fused, or par- 
tially fused segments. 
3. The postantennal processes are contiguous at their base but are 
not fused and do not form the characteristic Y-shaped structure pres- 
ent on other members of the genus. Additionally, although there are 
2 adhesion pads on each postantennal process, the projections on 
these pads do not have the characteristic brushlike appearance of 
those on other members of the genus. These two differences, however, 
suggest that the structure, in the group to which the Eniwetok speci- 
men belongs, is of a primitive nature. 
In spite of these differences, the specimen is placed in the genus 
Pseudotaeniacanthus not only because the characteristics, other than 
the above, coincide most closely with those previously described for 
other members of the genus but also because there is an overall simi- 
larity of the postantennal process of the Eniwetok specimen with that 
of the other members. 
Family PANDARIDAE 
Pandarus cranchii Leach 
Pandarus cranchit Leach, 1819, p. 535.—Lewis, 1966, p. 81, figs. 10-13.—Cressey, 
1967, p. 9, figs. 27-33. 
For remaining synonymy, see Lewis (1966) and Cressey (1967). 
Hosts AND DISTRIBUTION.—See Lewis (1966). 
Mareriat.—4 females (USNM 120746) from the external surface 
of Galeocerdo cuviert (Lesueur). 
MEASUREMENTS (in mm).—4 females: 
mean range 
Length of body, excluding caudal setae 6. 87 6. 51-7. 14 
Length of cephalothorax, including frontal region 4. 06 3. 85-4. 33 
Width of cephalothorax 4. 26 3. 96-4. 48 
Length of genital segment 2.61 2. 37-2. 74 
Width of genital segment 2. 94 2. 74-3. 03 
Length of caudal rami Its Be 1. 30-1. 70 
Length of anal lamina 1. 63 1. 52-1. 74 
Length of egg strings (6 strings) 4. 07 3. 55-5. 00 
Descrirtion.—See Lewis (1966). 
