Vou.2]  Ksterly—Copepoda of the San Diego Region. 225 
4 Lips of genital orifice long, with one bristle; the posterior 
antenna and maxilliped show distinct differences, especially in 
the elongation of the terminal hook. . 
The genus may be readily recognized by the cylindrical shape 
of the body, with the eye lenses at the anterior end. 
1. Corycaeus venustus Dana. 
Corycaeus venustus Dana, 1849, p. 280; 1852, p. 1222, pl. 86, 
fig. 4a. 
Corycaeus limbatus Brady, 1883, p. 114, pl. 49, figs. 18-22. 
Corycaeus venustus Giesbrecht, 1892, pp. 659, 674, pl. 51, figs. 32, 
33, 34, 47. 
Fig. 61.—Corycaeus venustus. (a) Female, dorsal, X83. (b) Fourth foot, 
female, X140. 
2 Cephalothorax with 4 segments, abdomen with 2, ventral 
keel rounded, furea almost 5 times as long as broad (Genital seg- 
ment: anal segment: furea:: 3:2:2). 
