Vou.2] Esterly—Copepoda of the San Diego Region. PAYS) 
Coloration: Reddish, due to the presence of rose, brown 
or greenish oil globules in the transparent body. 
Length: Female, 1.28 mm. 
Occurrence: Rather uncommon; one female was taken June 
14, 1904, at San Diego. Occurs also in the winter. 
Fam. ONCAEIDAE. 
Oncaeidae Giesbrecht, 1892, p. 81. 
Paired eyes with cuticular lenses and pigment bodies not 
developed. 
2 Form of body in general like the Cyclopidae. Each por- 
tion of the furea has six bristles. Anterior antennae 4- to 6- 
jointed; posterior antennae 3- or 4-jointed; mandibles reduced 
to blade, without specific form. Maxillae are bristle-bearing 
platelets, usually separated into two lobes. Anterior maxilliped 
2-jointed. Posterior maxilliped 4-, seldom 3-jointed, terminal 
hook strong. First to fourth pairs of feet with 3-jointed rami; 
inner ramus of fourth foot longer or but little shorter than the 
outer. 
& Sexual peculiarities in form of abdomen and_ posterior 
maxillipeds, fewer joints usually in anterior antennae, rarely in 
posterior antennae and mouth parts. 
1. Genus Oncaea Philippi. 
Oncaea Philippi, 18438, p. 62. 
Antaria Dana, 1852, p. 1227. 
Antaria Claus, 1863, p. 158. 
Antaria Brady, 1883, p. 119. 
Oncaea Lubbock, 1860, p.. 183. 
Oncaea Giesbrecht, 1892, pp. 81, 590, 755. 
Shape of body as in Otthona. Terminal joints of inner rami 
of swimming feet long and narrow, that of the fourth pair at 
least one and one-half times as long as the first and second 
together ; fifth foot rod or knob-shaped. 
2 Both portions of body with five segments (figs. 55a, 56a). 
Anterior antennae 6-jointed, posterior 3-jointed, hooked bristles 
of medium leneth(c/. fig. 56c). Posterior maxillipeds 4-jointed, 
rows of spines on inner border of second basal. Outer mar- 
ginal bristles of outer rami of first and second feet as follows: 
