22 Journal of Entomology and Zoology 
single series, the membrane not being coiled. No eye spots. Collar with ventral lobes 
proportionately long and acute, the dorsal lobes small and approximate. Notopodial 
sete of usual two types; few. Uncini with beak divergent, nearly horizontal, the 
“neck”? short and the edge of body below bulging much as in Paralaonome japonica. 
Body furrowed along each side just above notopodia excepting anteriorly. Ventral 
plates sharply limited, elevated; .all of abdominal plates bisected by the median 
longitudinal sulcus excepting the first one, which is entire. Total number of somites, 
fifty-six, of which eight are thoracic. 
Length without branchie, 12 mm.; with branchie#, near 15 mm. 
Type—M. C. Z. 2, 175. 
Taken among tufted algw, June 25, 1911 (C. F. Baker). 
Pseudopotamilla lampra sp. nov. 
In this form the collar membrane is crossed by a series of longitudinal dark 
stripes, one in line with each radiole, as in Potamilla colorata, these narrowing caudad. 
Branchie sometimes mostly dark with light transverse bands. Anterior thoracic seg- 
ments darkly pigmented both above and below, and also along both sides of tori, and 
most setigerous papilla and tori of succeeding regions of body also surrounded in 
some degree with a pigmented area. Branchial membrane with free dorsal edges 
produced into two lobes on each side, the two of each pair overlapping, the posterior 
lobe rounded, the anterior angular with its caudal margin transverse and the other 
long and oblique. Radioles nineteen pairs, several of these at dorsomesal end of series 
much reduced. Eyes conspicuous but few, only one, or occasionally two, on a radiole 
and some radioles wholly lacking them. This species has only seven setigerous thoracic 
somites. Total number of segments, near ninety-four. 
Length, about 28 mm.; with branchiz, 33 mm. 
A note states that this form is pinkish in life. A paratype was taken “in a large 
white sponge.” 
Type—M. C. Z. 2, 176. 
Pseudopotamilla macrops sp. nov. 
While the type of this species includes only the anterior end of the body, its char- 
acters seem su....ciently marked for subsequent idntification. As in /ampra, the anterior 
segments are darkened with purplish brown pigment, especially adjacent to the seti- 
gerous papille and about the tori, the ventral plates, however, remaining pale. 
Branchial membrane also pigmented caudally, and the branchie transversely banded. 
Only two eyes on each side are present in the type, a single one each on the second and 
third radiole from the dorsal end of the series. ‘These eyes are exceptionally large 
and prominent, much larger than in any of the other species here recorded, embracing 
practically the entire width of the stalk. The free dorsal edges of the branchial 
membrane nearly straight, each with only a very slight angulation near its anterior 
end, not being truly lobate. Nine pairs of radioles. Minor dorsal lobes of collar 
prominent, produced well forward, curving a little mesad distally, the mesal edge 
reflected down the dorsal groove as usual. 
Width, .75 mm. Length of branchie, 2.5 mm. 
Type—M. C. Z. 2, 177. 
Pseudopotamilla scotia sp. nov. 
Differing from the other species here described in having nine setigerous thoracic 
somites. Anterior somites of thorax darkened above, down the sides on both sides 
