Pomona College, Claremont, California 13 
responding plate in /Jagunae. Maxillae I on right side with nine teeth, on left appar- 
ently with seven. Maxillae III with teeth in arrangement as in /agunae but only four 
in number and different in all being blunt and shorter. IV as in the other species but 
teeth four instead of five. The number of segments in the type is near one hundred 
and sixty-five. 
Length, 40 mm.; width, 1.1 mm. 
Type—M. C. Z. 2, 156. 
Taken among holdfasts of kelp. (C. F. Baker, June 30, 1911.) Also a small speci- 
men taken August 2, 1917, by Prof. Hilton. 
Biborin gen. nov. 
Setae all simple, limbate, well developed. First two segments achaetous. Eyes 
none. Maxillae absent, but the mandibles normally developed, the wall of the ali- 
mentary canal opposite the latter simply thickened. Notocirri rudimentary. 
Biborin ecbola sp. nov. 
Biborin echola sp. nov. 
The type as preserved is greyish brown of a dull bluish green cast. A note with 
the specimen also states that it is greenish in life. The body is strongly attenuated 
and pointed caudad, more moderately cephalad. The prostomium larger than wide 
and somewhat longer than the first two segments; subconically narrowed distad, 
apically rounded, flattened dorsoventrally. The two achaebous segments subequal in 
length or the second slightly longer, not produced forward below. Mandibles short 
and broad, not toothed, the edges meeting at an acute angle in front; the caudal 
stems shorter behind point of separation than the blades in front of this point, rather 
slender, blunt behind. Posterior lobes of parapodia subcylindrical, a little conically 
narrowed distad but with apex well rounded, extending ectad or caudoectad; in middle 
region of body reaching to or a little beyond middle of longer setae, the setae rela- 
tively shorter in anterior region. Setae all simple and limbate with the usual double 
curve, the first curve or angulation obviously less marked than in 4. lagunae, which 
form this species superficially resembles. Number of segments in type, two hundred 
and seventy-seven. 
Length, 92 mm.; width without parapodia, 2.2 mm. 
Type—M. C. Z. 2, 157. 
Taken among Phyllospadix, September 17, 1917. 
GLY CERID 2 
Glycera exigua sp. nov. 
A small species easily recognizable among the known forms of the California 
coast by the character of the parapodia. Each of these present three lips, two anterior 
and one posterior; all three lobes triangular, pointed distad, with the posterior one 
fully equalling the other two in length. The neurocirrus is also triangular in out- 
line. The natocirrus is reduced to a small rounded or nodular form slightly above 
base of parapodium. Branchiae simple cylindrical filaments, each attached toward 
distal end of parapodium above as in G. alba and G. longipinnis; the first occurring 
on or near somite XXX, short, in actual length not greater than parapodium exclusive 
of terminal lips and falling much short of reaching ends of setae; absent from last 
twelve segments or so and those just in front of this caudal region much reduced. 
Prostomium of usual general form; consisting of fourteen or fifteen rings. Proboscis 
