224 University of California Publications. [ ZOOLOGY 
as long as the second basal, terminal hook not 1/5 as long as the 
second joint of the inner ramus. Inner ramus of fourth foot not 
1% as long as the outer ramus, third joint of former with two 
terminal bristles; third joint of inner ramus of second foot 
(fig. 60c) with 2 lancet bristles, the third notched on one side; 
projections on margin of joint much elongated. 
S. lomae differs from S. nigromaculata most in the relative 
lengths of the joints of the posterior antennae and in the form of 
the toothed bristles on the terminal joint of the inner ramus of 
the second foot. Two males were taken on May 31, 1904, but 
are so badly mutilated that it is impossible to make a drawing of 
the entire animal. 
Length: 3.2 mm. 
Occurrence: San Diego, May 31, 1904, 2 males. 
Nore.—The species of Sapphirina are separated into two general groups, 
according as the inner ramus of the fourth foot is very small and narrow 
(fig. 59b), compared with the outer ramus, or at least 34 as long as the 
outer. S. iris and S. angusta belong in the latter group, and S. scarlata and 
S. lomae in the former. S. iris is distinct from any other species in having 
3 bristles on the outer margin of the third joint of the outer ramus of the 
fourth foot; S. angusta may be recognized by the shape of the furcal rami. 
2. Genus Corycaeus Dana. 
Corycaeus Dana, 1848, p. 35; 1849, p. 280; 1852, p. 1203. 
Corycaeus Lubbock, 1856, p. 32; 1857, p. 409; 1860, p. 182. 
Corycaeus Claus, 1863, p. 154. 
Corycaeus Giesbrecht, 1891, p. 480; 1892, pp. 85, 659, 735. 
Corycaeus Dahl, 1894b, p. 67. 
Corycaeus Wheeler, 1899, p. 191. 
2 Eye lenses close together, in some cases contiguous; fifth 
thoracic segment very short. Anterior antennae 6-jointed, 
bristles not plumose; second basal of posterior antennae large, 
first basal very short, each provided with a long, heavy bristle, 
inner ramus with a thick, strongly curved hooked bristle. Ter- 
mina! joint of anterior maxilliped ends in a strong hook; second 
basal of posterior maxilliped with one bristle on the inner mar- 
gin, terminal hook more slender than in Sapphirina. Outer 
ramus of swimming feet longer than inner rami; outer marginal 
bristles of outer ramus in first and second pairs are lanceolate 
and dentate, and are more or less suppressed in the third and 
fourth pairs. 
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