290 CHONE FAUVETLLI. 
extends from Shetland to the Channel Islands, and Chone Princei occurs in the Gulf of St. 
Lawrence, Canada. 
1. CHone Fauvett, McIntosh, 1916. Plate CXXI, figs. 2—2c—body, cephalic plate, ova, 
tube; Plate CX XX, figs. 2—2b—bristles and hook. 
Specific Characters.—Cephalic plate surrounded by an ample and continuous collar cleft 
only at the dorsal fissure and ensheathing the base of the branchie, which are fixed to a 
firm, horse-shoe-shaped rim. Body rounded, 5—6 inches in length, and having fifty to nmety 
seoments. Anterior region of eight segments. It is slightly narrowed anteriorly toward the 
collar, and is tapered for a short distance at the tail, at the tip of which is the anus. The 
deep dorsal fissure is continued to the second segment, and thence the dorsal groove passes 
backward to the anterior border of the eighth segment, where it inclines to the right, and 
reaches the mid-ventral region of the ninth seement—thereafter proceeding to the tip of the 
tail. ‘The branchize vary from twelve to thirty-six on each side, and they are connected 
together by a membrane almost to the tip, the dorsal fissure, however, causing a gap in the 
funnel. In the preparations they are slightly spiral or twisted, and the tips curved inward. 
Each filament is stiffened by a camerated chordoid axis as in Sabella, and a jointed axis 
enters each pinna. The pinne are numerous, and specially elongated at the base around 
the mouth so as to resemble cirri. The two tentacles occur at the edge of each ventral 
fold. Bristles of the anterior region—except those of the first segment—of two kinds, viz., 
a dorsal series with elongated tapering and winged tips, and a ventral in which the tip of 
the shaft terminates abruptly, and a spatulate outline is given by the short broad serrated 
wings. They are dorsal to the rows of hooks. Posteriorly the bristles are all of the elongated 
kind with tapering winged tips, and are ventral to the rows of hooks. Rows of long hooks 
commence on the second bristled segment, and are double anteriorly. Shaft of hook long, 
curved and striated, tapering inferiorly, a shoulder below the translucent neck, and with 
five smaller teeth on the crown above the main fang. At the ninth bristled segment the 
avicularian hooks begin and continue to the posterior end. They form a single row, and 
have a broad, squarish base, a main fang and about four teeth above it. Tube lined by a 
tough membrane and more or less coated with sand. 
SYNONYMS. 
In the following lst of synonyms it has been thought prudent to give the entries for Chone 
infundibuliformis, since the distinctions between this and C. Fauveli were unknown. 
1780. Tubularia penicillus, Fabricius. Fauna Greenl., p. 438. 
1843. ? Sabella volutacornis, Rathke. Nova. Acta. Acad. C. L. C., xx, p. 223, tab. xu, figs. 1—4. 
1851. »  wnfundibuliformis, Sars. Nyt Mag., Bd. vi, p. 203. 
1856. Chone infundibuliformis, Kroyer. Danske Vid.-selsk. Forh., p. 33. 
»  NSabella paucibranchiata, idem. Ihbid., p. 22. 
»  ¢ Chone suspecta, idem. Ibid., p. 33 (young ?). 
1861. ? ,, Kroyeri, Sars. Forhandl. Vidensk-selsk. Christ., p. 126. 
1865. »  wmfundibuliformis, Malmgren. Nord. Hafs.-Annul., p. 404, Tab. xxvii, fig. 87. 
» , i. De Quatrefages. Annel., t. 11, p. 466. 
1867. . . Malmgren. Annul. Polych., p. 116, Tab. xiv, fig. 79. 
