Pomona College, Claremont, California 23 
of the tori and also more or less ventrally with purplish brown pigment. Processes 
or lobes on free edge of branchial membrane above almost of same form as in P. lampra 
and similarly overlapping. Nineteen pairs of branchial radioles. No eyes. Ventral 
lobes of collar prolonged, subacute, not overlapping. In the dorsal fascie of the 
ordinary thoracic somites the dorsal sete are arranged mostly in more or less single, 
curved, longitudinal series, the clavate ventrals being arranged in two vertical series 
at right angles to the line of the dorsals. Pennoned sete of the uncinigerous tori very 
prominent. Only a few of the most anterior abdominal segments present in type. 
Greatest width, 2 mm. Length of branchie, + mm. 
Type—M. C. Z. 2, 178. 
Taken in a large white sponge. 
SERPULID 
Eupomatus intereans sp. nov. 
This species is separated from E. uncinatus (Philippi) with some hesitation since 
specimens of the latter are not at hand for direct comparison. It would seem, how- 
ever, to be clearly different, to judge from Ehler’s figure, in the form of the uncini. 
These are much broader (i.e., at right angles to the dental line), the base projecting 
conspicuously but not forming an angulate shoulder as in E. gracilis, being nearly 
evenly and rather broadly rounded. The teeth are mostly seven in number, the end 
below the last of these set off as usual, rounded. The upper collar sete coarse, with 
two teeth or spurs at base of the slender tip, these commonly more or less unequal in 
size. Branchie thirteen pairs. Operculum in general as in umcinatus; width of prin- 
cipal expansion 1.25 mm.; the latter even, by narrowing into the stalk, the rim with 
thirty-eight projecting acute teeth or serrations which are straight or very nearly so, 
not at all uncate as in uncinatus in which they are also fewer (thirty). Inner crown 
of eleven spines each tapered evenly to an acute tip and bent in abruptly toward the 
center above, the proximal portion being erect and ordinarily parallel with the others. 
No process or series of processes detected within this crown, the base from which 
these arise being evenly concave on its distal surface and convex on the proximal. 
Spines of the inner crown dark brown proximally as is the entire basal plate from 
which they arise, the remaining part of spines light brown. Operculum proper nearly 
black below teeth on proximal surface of the expansion and on adjacent part of stalk 
the remaining part of which is white; distal surface of funnel pale. Branchie 
and body in general pale, unmarked or some of the -branchie with a blackish mark 
on stalk toward distal end. Thoracic setigerous somites seven. Abdominal segments, 
ninety. 
Type—M. C. Z. 2, 178. 
Length exclusive of branchiz, 20 mm.; to end of operculum, about 24 mm. 
Width, 1.5 mm. 
