Vot.2] Esterly—Copepoda of the San Diego Region. 213 
Fig. 53.—Euterpe acutifrons. (a) Male, lateral, 175. Ab.1, first 
abdominal segment. Th.5, fifth thoracic segment. (b) Outer 
ramus of fourth foot of female X140. (c) First foot of male 
x265. (d) Fifth foot of female X410. (e) Anterior an- 
tenna of male 195. 
3. Genus Clytemnestra Dana. 
Clytemnestra Dana, 1847, p. 154; 1852, p. 1193. 
Clytemnestra Lubbock, 1860, p. 180. 
Goniopsyllus Brady, 1883, p. 107. 
Clytemnestra Giesbrecht, 1892, pp. 79, 565, 733. 
Clytemnestra Wheeler, 1899, p. 188. 
2 Anterior part of body composed of four segments, pos- 
terior part of five; furea short. Anterior antennae 7- to 8-jointed, 
bristles short, posterior antennae 3-jointed, outer ramus sup- 
plied by one or two bristles. Posterior maxilliped 2-jointed, 
slender and elongated, with short hooks at the end. Rami of 
swimming feet long and narrow, inner ramus the longer, 
3-jointed in all pairs; outer ramus 3-jointed except in first 
pair, where it is 1-jointed; fifth pair rudimentary, 2-jointed. 
