Vou.2] Esterly—Copepoda of the San Diego Region. 167 
imal joints of outer ramus of first foot shorter and more slender 
than on the third joint; terminal saw of outer ramus of third 
foot indented at base, inner ramus of foot with three spines on 
posterior surface of second and joints; no spines on posterior 
surface of inner ramus of fourth foot. Anterior surface of outer 
ramus of second to fourth feet without spines, few on the anterior 
face of the inner ramus. Fifth foot fig. 28c, d. 
@ Anterior antennae 23-jointed, reaching to end of furea; 
abdomen symmetrical, ventral surface of genital segment convex. 
Posterior antennae mandible, maxilla and maxilliped and swim- 
ming feet as in the male. Fifth foot symmetrical, rather well 
developed (fig. 28e). 
Coloration: Opaque white in formation, eye spots red. 
Length: Male, 5.3 mm.; female, 4.6 mm. Giesbrecht gives the 
leneth of the male as 4.5 mm. 
Occurrence: Two males, one female collected at San Diego, 
May 31, 1904; obtained also May 18 and June 23, 1904. 
The female was not obtained by Giesbrecht, and has not since 
then been deseribed, as far as I am aware. There can be little 
doubt that the outer ramus of the right fifth foot in the male 
is 3-jointed, and that the terminal joint in Giesbrecht’s single 
specimen was broken off. I have seen a considerable number of 
males, and in all the outer ramus is 3-jointed as shown (fig. 28d). 
4. Scolecithrix subdentata n. sp. 
© Last two thoracic segments fused, each side with a small in- 
dentation in the lateral margin. Anterior antennae 23-jointed, 
not much longer than the cephalothorax. Inner ramus of the pos- 
terior antenna 34 as long as the outer; second basal of maxilla 
with four bristles, rami each with five (fig. 29c). Appendages 
of anterior maxilliped vermiform. First basal of fourth foot 
with a small, non-plumose bristle on inner margin; inner mar- 
ginal bristle of second basal of third and fourth pairs long and 
plumose; outer margin of first basal of first, second and third 
pairs with a small tooth in the middle, inner margin with prom1- 
nent rounded process bearing the inner marginal bristle. First 
joint of outer ramus of first pair with outer marginal bristle. 
Fifth foot 2-jointed, leaf-like; terminal joint broad, oval, with 
