296 CHONE DUNERI. 
Fauveli, but the posterior part of the crown is less rounded and its three or four teeth very 
sharp. The posterior hooks (avicular) have higher crowns than in C. Fawveli, with four 
teeth above the main fang; the posterior part of the crown is less rounded, and the main 
fang shorter. 
SYNONYMS. 
1867. Chone Dunert, Malmgren. Annul. Polych., p. 116, Tab. xi, fig. 75. 
a »  Marenzeller. Denksch. Kaiserl. Akad. Wissensch. Wien, Bd. xxxv, p. 36, 
sep. abd. 
1878.  ,, (another), McIntosh. Trans. Linn. Soc.; ser. 2 Zool., p. 508, pl. Ixv, figs. 18 and 19. 
1880. »  Duneri, Marenzeller. Ann. Nat. Hist., ser. 5, vol. vi, p. 271. 
. H At Langerhans. Zeitschr. f. wiss. Zool., Bd. xxxiv, p. 114, Taf. vi, fig. 44. 
1883. - ,»  Wirén. Cheetop. ‘Vega’ Exped., p. 422. 
iss 5 % Levinsen. Vidensk. Meddel., p. 186. 
1894. 5 »  Bidenkap. Christ. Vid.-selsk. Forhandl., p. 133. 
1897. 3 * Michaelsen. Polych. deutsch. Meere., p. 180. 
NGOs Bo re Moore. Proc. U.S. Nat. Mus., vol. xxxvu, p. 145. 
1913. . »  Hofsommer. Wiss. Komm. Meers. deutsch., xv, p. 336. 
1914. ss, y Southern. Proc. Roy. Irish Acad., vol. xxxi, p. 141. 
NOUG, gp »  MelIntosh. Ann. Nat. Hist., ser. 8, vol. xvi, p. 42. 
Habitat—Variety in 7 fathoms, Bressay Sound. Dredged at a depth of 53 fathoms 
by the “ Knight Errant,” at Station 3, 3rd and 4th August,.1880. It is interesting that 
small loosely reticulated siliceous sponges somewhat resemble the branchie of such 
forms and are found in company. Clew Bay (Southern). A specimen from the Clyde is 
labelled in the British Museum Arippasa infundibulum (64. 6. 30. 2). 
Abroad it occurs as follows :—Spitzbergen (Malmgren), Madeira (Langerhans), Siberian 
and Behring’s Seas (Wirén), Barents Sea (Marenzeller), N.H. America (Moore), Gulf of St. 
Lawrence, Canada, at Station 2, 1872 (dredged by Dr. Whiteaves) ; Atlantic Coast, U.S.A. 
(Verrill). 
The cephalic collar forms a considerable process dorso-laterally, passing backward to the 
line of the second bristle-tuft and doubling forward along the edge of the dorsal fissure on 
each side so as to make conspicuous parallel edges to the fissure, as far as the base of the 
pedicle for the branchiz. The pedicle after removal of the branchiz does not project beyond 
the rim of the collar. The branchiz are distinguished by their comparative length, and the 
long slender terminal processes. The structure of the filaments is typical, and they slightly 
taper distally, ending in a remarkably long winged process which tapers to a delicate tip, 
and has a slender continuation of the chordoid axis in the centre. ‘The number of filaments 
ranges from six to twenty-two on each side according to size, the latter being the number 
in a fine example from Jan Meyen kindly sent by Prof. Fauvel, and they are united by 
membrane throughout the greater part of their length—the tip being free. The pine are 
of considerable length—each having the jointed chordoid axis. They continue long till 
near the basal web of the terminal process, when a few shorter occur. 
The body in all the examples observed is considerably smaller than that of C. Fawveli, and 
is nearly of the same diameter throughout the anterior three-fourths, though a little tapered 
