4 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
segments” and “free pedigerous segments” are used to designate those 
thoracic segments that are not fused with the cephalon. The term 
“oenital segment” is used, with some reservation, to designate the 
fused sixth and seventh thoracic segments (= fifth and sixth pedigerous 
segments) in the Caligidea (Caligoidea of Yamaguti, 1963). The term 
“ovigerous” is used to indicate a female with egg strings, the term 
“nonovigerous” to indicate a female without egg strings even though 
the genital segment may contain eggs. 
The terminology applied to the appendages and processes is the 
same as that in Lewis (1967). To facilitate the use of the thoracic leg 
tables, a hypothetical thoracic leg is shown in figure 1, giving the 
various thoracic leg armature elements used in the tables; an analysis 
of the hypothetical thoracic leg is given in table 1. 
Order CYCLOPOIDA 
Family BOMOLOCHIDAE 
Nothobomolochus gibber (Shiino) 
FIGuRES 2-4 
Bomolochus gibber Shiino, 1957, p. 411, figs. 1-2. 
Nothobomolochus gibber (Shiino).—Vervoort, 1962, p. 70. 
Pseudartacolax gibber (Shiino).— Yamaguti, 1963, p. 14, pl. 8, fig. 1. 
Host AND DISTRIBUTION.—Tylosurus giganteus, Japan. 
MatTeErRIAL.—8 females and 2 males (USNM 120739) from the gill 
cavity of Belones platyura Bennett. 
MEASUREMENTS (in mm).—7 females and 2 males: 
female 
mean (range) male 
Greatest length, excluding caudal setae 1. 82 1. 71-2, 02 AE Sees 
Length of prosome 1.15 1. 03-1.30 1.01, 0.95 
Width of prosome 0. 98 0.90-1.08 0.81, 0. 86 
Length of cephalothorax 0. 67 0. 58-0. 74 0.50, 0. 58 
Length of genital segment 0. 21 0. 18-0.25 0.16, 0. 14 
Width of genital segment 0. 29 0. 22-0. 36 0.29, 0. 25 
Length of egg sac (6 sacs) 1, 23 0. 99-1. 37 
Description.—Cephalothorax of ovigerous female (fig. 2a) wider 
than long, consisting of cephalon and first 2 thoracic segments. 
Anterior end of cephalothorax forming 2 bilobed projections separated 
by rounded dorsal and bilobed ventral median surfaces. Lateral 
margins irregular, lateral posterior margins lobate. Dorsal cephalo- 
thoracic surface arched, with anterior median fissure. Width of free 
second pedigerous segment slightly more than two and one-half times 
the length, slightly more than half the width of cephalothorax. 
Lateral surfaces winglike, extending slightly past base of second 
