Vot.2] Ksterly.—Copepoda of the San Diego Region. 165 
basal of fourth pair without inner marginal bristle, first joint of 
outer ramus of first pair (fig. 26c) with outer marginal bristle. 
Fifth pair of feet absent. 
4 Mouth parts not retrograded; left fifth foot biramous, right 
uniramous, terminal joint very short (fig. 26d). 
Coloration: In formalin, both males and females have a light 
red or pink color. 
Length: Both sexes, 2-2.2 mm. 
Occurrence: June 28, 1904, one female; December 29, 1903, 
one female, surface tow at 2. a.m. One male, October 20, 1904. 
2. Scolecithrix bradyi Giesbrecht. 
Scolecithrix bradyi Giesbrecht, 1888, p. 337; 1892, pp. 266, 283, 
plete. ple doy Hes. oe 7 bi 2d 28s pk Sitios. dl, 
2, 9; 1898, p. 42. 
/ 
Fig. 27.—Scolecithria bradyi. Female X31. 
9° Line of separation between fourth and fifth thoracic seg- 
ments visible only on the back; lateral portions of last thoracic 
segment elongated into two flaps, on the right more than on the 
left. Third and fourth segments of the abdomen much broader 
than long, genital segment asymmetrical, anal segment as long 
as the preceding ones, furea twice as long as broad. Anterior 
antennae 19-jointed, not reaching the posterior end of the thorax. 
Outer ramus of posterior antennae longer than the inner, seventh 
joint of the outer ramus without a proximal bristle. Maxilla as 
in S. danae, except that outer ramus has four bristles. First 
basal of fourth pair without bristle on inner margin, first jomt 
of outer ramus of first pair without outer marginal bristle; fifth 
foot very small. 
4 Right anterior antennae with 18 joints, left with 17. Left 
fifth foot longer than the right by the last joint. Third joint of 
the outer ramus of the right large and with a prong. 
Coloration: Yellowish pigment in body, mouth region, and 
on feet. 
