REPORT ON THE ANNELIDA. 
85 
the average development, rising from the posterior and outer angle of a prominent 
elevation, and in the preparations being directed between the feet, or upwards 
and outwards. The palpi are of moderate length and smooth. They taper rather 
quickly toward the filiform termination. The tail is completed by two long 
styles (cirri). 
The scales amount to fifteen pairs, and are pale, slightly translucent and milky, and 
show thinly scattered small papillae on their free surface, and a few clavate cilia along 
their posterior border (PL XVIII. fig. 2). The scar of attachment, in the anterior third 
of the body, is toward the anterior and outer region of the scale; posteriorly in the 
elongated scales it is more nearly central. The finely branched nerves are well seeu. 
The first and second scales, as usual, show the papillae very distinctly. 
The feet are furnished with a much denser as well as a darker yellowish series of 
bristles than those of Polyeimoa levis, with which it was associated. The dorsal division 
has a series of stoutish bristles (PL VIIa. fig. 14) with well marked and rather broad, 
smooth tips, and close spinous rows. Such bristles are not round, but conspicuously 
angled, a feature best seen in the larger examples of the Polynoidae. The group shows 
a definite arrangement of longer, straighter, and more pointed forms next the ventral 
series (i.e., externally). 
The ventral bristles superiorly possess rather long tips (PL VIIa. fig. 15, representing 
one of the larger forms) and distinct spinous rows. The bifid tip is less evident than in 
those from the middle of the series (PL VIIa. fig. 16). The secondary spur of the same 
tip is broad and strong, and the spinous rows in all the ventral bristles are very boldly 
marked. A minute Loxosoma with transversely striated stalk, and many Foraminifera, 
occurred amongst the bristles. 
In one specimen fragments of a hydroid zoophyte, sponge-spicules. Diatoms, and 
Crustacean debris occupied the intestine. 
There does not appear to be anything distinctive in the sections of this form, or of 
the other varieties of Lagisca magellanica. 
Lagisca per acuta, n. sp. (PL IV. fig. 6; PL VIIa. figs. 10, 11). 
Habitat . — Several specimens were dredged off St. Vincent, Cape Verde Islands, 
July 1873. 
All the examples are incomplete, the longest measuring about 14 mm. in length 
and 4‘5 mm. in breadth. 
The flattened dorsum is somewhat regularly tesselated throughout with brownish 
markings, and a tinge of the same colour extends to the bases of the feet. 
Toward the posterior third of those with the pigment well developed the segments 
