Vot.2]  Hsterly.—Copepoda of the San Diego Region. fre 
On 
OV 
& Considerably like EF. messinensis, the chief difference being 
in the structure of the fifth pair of feet (fig. 206). The claw of 
the right foot is shorter than the basal (in messinensis longer). 
Coloration: About as in H. messinensis. 
Length: Female, 3.4-4 mm.; male, 3.5 mm. 
Occurrence: San Diego, May 31, 1904, two immature males, 
one female; June 23, 1904, one female adult ; December 23, 1904, 
‘*Banks,’’ eleven females, all adult; one male adult, December 
30, 1904, on the ‘‘ Banks.’’ 
4. Euchirella amoena Giesbrecht. 
Euchirella amoena Giesbrecht, 1888, p. 336; 1892, pp. 233, 244; 
pl. 15, fig. 20; 1898, p. 36. 
Fig. 21.—Euchirella amoena. Male. (a) Lateral X20. (b) Fifth foot 
x 45. 
Q Unknown. 
& Front without crest. Fifth pair of feet shortened, the right 
about four times as long as the second basal is broad. 
Length: Male, 3.02 mm. 
Occurrence: San Diego, May 28, 1904, one male. 
5. Euchirella galeata Giesbrecht. 
Euchirella galeata Giesbrecht, 1888, p. 336; 1892, p. 233, 244; pl. 
15, fig. 18; pl. 36, figs. 22, 26; 1898, p. 36. 
2 Head with high crest, and rostrum; genital segment asym- 
metrical, strongly protruding on the posterior portion of the 
dorsal surface. Inner ramus of posterior antennae about 25 as 
