246 ON THE GENUS NOTOPYGOS. 
Notopygos cirratus, n. sp. 
Siboga-exped. Stat. 99, Anchorage of North-Ubian; 
Stat. 28, 8° 48’ Lat. S., 115° 40’ Long. E. 
The largest specimen measures 18!/, mm. in length; the 
number of its segments amounts to 28. The ground colour is 
leady grey; a dark band runs around the base of each noto- 
podium and the basal joint of the dorsal cirri is violet. The 
anterior part of the dorsal side of each segment is divided into 
three areas nearly as in Notopygos sibogae. The caruncle 
extends to the 5th segment and is furnished on each side 
with 11 folds. The median antenna is very short, about a 
fifth of the length of the caruncle. The anal opening is 
situated on a papilla in the intersegmental groove 23/24. 
The accessory cirri are much longer and thicker than the 
branchial filament and extend to the middle of the dorsum. 
The branchiae commence on the 5th segment. The ventral 
as well as the dorsal setae are bifurcate and denticulated ; 
in the ventral bristles the long limb is furnished with a 
couple of conspicuous denticles, whereas in the dorsal 
ones it shows usually only a single serrulation. 
Sangiria, n. g. 
Body oblong oval, agreeing in general appearance with 
that of Chloeia and Notopygos, however its caruncle without 
crest or folds, wedge-shaped, with indistinct transverse 
grooves. Eyes absent. Branchiae small, only consisting 
of a few filaments; first pair of them on the fifth segment. 
Branchial cirri present. Ventral bristles denticulated. Anal 
cirrl paired. 
Sangiria hystrix, n. sp. 
Siboga-exped. Stat. 126, 3° 27.1 Lat. N., 125° 18.7 
Long. E., depth 2053 M. 
Length of the worm about 9 mm.; the number of its seg- 
ments 19. Body oblong oval, with long, opalescent bristles, 
Notes from the Leyden Museum, Vol. XX XIII. 
