Vou.2]  Esterly.—Copepoda of the San Diego Region. 159 
first joint of outer ramus of first pair of feet concave; outer 
border of third joint of outer ramus of second pair and its outer 
bristles different than in the following pairs of feet; outer mar- 
ginal bristle of second joint of outer ramus reaches almost to end 
of the first outer marginal bristle of the third joint. Third joint 
of outer ramus of left fifth foot of male (fig. 23a) with a stil- 
etto-like process; second joint with a finely dentate, pyramidal 
and pointed process (proc.). 
Coloration: Rather opaque, a fleck of red pigment in the 
mouth; most of the pigment is found on the back and sides of 
the cephalothorax, and on the posterior maxillipeds. 
Length: Female, 4 mm.; male, 3.5-4 mm. 
Occurrence: July 31, 1903, one male; June 23, 1904, one male 
and one female. A good many (12-15) males were taken at one 
time on December 23, 1903, on the ‘‘ Banks.’’ 
2. Euchaeta spinosa Giesbrecht. 
Euchaeta spinosa Giesbrecht, 1892, pp. 246, 263, pl. 16, figs. 12, 
26, 34,47; pl. 37, figs. 31, 34, 35, 50; 1898, p. 39. 
2 Elevation in front of head (fig. 24a) produced anteriorly ; 
genital segment almost symmetrical, with large, flap-like projec- 
tion at each side of the orifice (fig. 245). Second terminal bristle 
of the furea longer than the other terminal bristles, dorsal bristle 
much thicker than the terminal ones. Anterior antennae reach 
beyond the end of the furea by more than the end joints. First 
outer marginal lobe of maxilla with eight bristles, second basal 
with three, fused second and third joints of inner ramus with 
four. Outer border of first joint of outer ramus of first foot 
concave; outer border of third joint of outer ramus of second 
pair and its outer bristles different than in the following pairs; 
outer marginal bristle of second joint reaches to the end of the 
first marginal bristle of the third joint (fig. 24c). Basals and 
rami of posterior pairs of feet covered in places with short 
spines (fig. 24d). 
& Unknown. 
Coloration: Red in cephalothorax, sometimes on furea. 
plumose bristles of maxillipeds same color. Eggs blue. 
Leneth: Female, 6 mm. or over. 
