Polychaeta 19 B 
the notopodial lamella above the tips of which they do not rise and by which 
they are largely concealed. 
As usual, only capillary sete are found in both branches of the anterior 
parapodia. In both notopodia and neuropodia they are very numerous and 
are arranged in the usual two series. Crochets first appear on or near the 
eleventh parapodia, one or two in each, increasing in number caudad. The 
ordinary capillary sete are characterized by being densely and coarsely punc- 
tate, the punctae in part elongate or in form of short lines. |The crochets are 
hooded, the membranous shields somewhat clavately widening distad and 
extending completely over the head. The head is large and extends at right 
angles to the axis of the adjacent part of the shaft; it lacks an apical denticle 
and the process is cleft somewhat like the beak of a bird. (See Pl. IV, fig. 4.) 
Locality.— Unfortunately the locality label with the type, after its separa- 
tion, was displaced. There seems little doubt, however, that it was from 
Collinson point, Alaska, probably from Station 27o. 
Larva SPIonip A. 
Two larve of this form were secured in plankton among the more numerous 
phyllodocid larve (Paranaitis sp.). These are Nerine-like forms. The prosto- 
mium is anteriorly pointed, the point less prolonged and less‘ acute than in 
corresponding stages of Nerine cirratulus. Two pairs of eyes are present. Palpi 
well-developed, thick. In one specimen twenty setigerous segments are present. 
The development of the parapodial lamelle has progressed considerably, the 
postsetal notopodial lamelle on the anterior segments showing already a distal 
elongation. Capillary sete alone are present on the first thirteen pairs of para- 
podia. On the fourteenth hooded crochets appear in the neuropodia and con- 
tinue to the last, the maximum number attained being three. (See pl. IV, 
fig. 6.) No crochets were detected in any of the notopodia. Length 1.5mm. 
The general form and structure of the specimen is shown in PI. IV, fig. 5. 
The second specimen is of nearly the same length, but is proportionately 
more slender and presents twenty-four or twenty-five setigerous segments. It 
is otherwise similar in general form and structure to the other specimen. 
Locauiry.—Alaska: Grantley harbour. Station 20a. July 30, 19138. 
Surface. 
LaRVAL SPIoNnID B. 
With the field notes made by the marine zoologist of the expedition (Mr. 
Johansen) are two sketches of larve which are obviously spionids. Specimens 
of these forms, however, were not in the material submitted for study, so that 
various desirable details cannot be ascertained with reference to them. 
(a) The first sketch represents a spionid, noted as less than 1mm. in 
length, in which both anterior and preanal ciliary rings are present. There are 
fourteen setigerous segments. The palpi are subconical, distally rounded 
organs and project caudoectad. Across the anterior end of the prostomium 
are shown eight eyes, of which three on each side form a triangular group. The 
prostomium is anteriorly slightly indented, not at all pointed. 
Locarity.—Dolphin and Union strait (off Bernard harbour). Station 40c. 
June 7, 1915. Pelagic. Ice 6 feet, over 9 feet of water. 
(b) The second sketch is of an apparently older larva about 2 mm. long. 
It is similar in general appearance to the preceding. Nineteen setigerous somites 
are represented. Both anterior and preanal ciliary bands represented as still 
present. Prostomium and palpi similar to those of (a). Only four eyes, two 
of each outer group of the preceding form being absent. The sketch also 
represents the eyes as farther caudad than in the other form, being shown, 
in fact, as just behind the ciliary band instead of in front of it. 
Locauity.—Alaska: off Martin point. Station 32c. July 30, 1914. 
71927—2} 
