EEPOET ON THE ANNELIDA. 
447 
Dr. Baird’s tubes (for he only describes the tubes) were collected during Sir J. Clark 
Boss’ Antarctic expedition, two coming from Nar 9 on Island. 
In size and external appearance this form bears a general resemblance to Lanice 
conchilega, Pallas, though the following distinctions are evident. The branchiae are 
smaller and much less finely ramose than in Lanice conchilega. The whitish glandular 
lateral band is somewhat narrower than in the latter, and the ridges bearing the hooks 
in front are considerably shorter. Both forms have seventeen pairs of bristle- tufts, 
the only difference being the somewhat shorter winged region in the foreign 
species. 
The hooks (PI. XXVIIa. fig. 22) present a general resemblance to those of Lanice 
conchilega in the length and erectness of the upper region, but they differ in the relative 
proportions of the teeth above the great fang, in the outline of the dorsal curve (which in 
the foreign species has a well marked outward bend at the base), and in the larger and 
longer appendage of this region. The condition of the latter process, again, affects the 
ventral curve just as the larger process at the anterior inferior angle modifies that region. 
In the middle of the curve beneath the great fang a prominent process projects, whereas 
none exists in Lanice conchilega. The minute points (a kind of microscopic shagreen) 
along the basal region of the hook are less developed than in the latter species. 
The food of this form consisted of a whitish pulp rich in Diatoms, Radiolarians, the 
long siliceous cylinders with pointed ends, and a few Foraminifera and fragments of 
sponge-spicules. 
As Dr. Baird states, the diameter of the tubes (PI. L. fig. 1) is about that of an 
ordinary goose-quill somewhat narrowed toward the remarkable fan-shaped expansion. 
The tube is composed of a tough chitinous secretion strengthened externally by frag- 
ments of shells, calcareous polyzoa, tubes of Annelids, and other debris. Its aperture 
is turned over in the form of a broad frill, widest in the middle, and is likewise formed 
of the yellow chitinous secretion stiffened by a few calcareous fragments. The lip of 
this process so bends round the tube that only the stalk or pillar of the fan is not 
embraced by it. The stem supports a wide fan consisting df a broad basal region, from 
the outer side of which a series of filaments proceed, and the majority of these divide 
dichotomously. In structure the fan agrees with the tube, the long and somewhat 
stiff chitinous processes being strengthened with sponge-spicules and other linear objects 
in an ingenious manner, while others present numerous minute grains of sand, ranged 
along the filaments. One end of the tube is either sunk in sand or attached to stones, 
shells {e.g., Terehratula), and other structures. 
The absolute identity of this with Dr. Baird’s is of course open to doubt, since he had 
no animal. It is probable, however, that they belong to the same form. 
The tube now in the British Museum was found at Nargon Island as above 
mentioned. 
