128 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 92 
be much reduced. Notopodia have similar, but slenderer and longer, 
acicular setae, also alternating with capillary setae. 
This agrees fully with C. filigera (Chiaje), to which it is hereby 
referred. It is well known from parts of South America (Ehlers, 
1897, p. 110; 1901, p. 183; Fauvel, 1916, p. 446). It differs from C@. 
capillaris Verrill (below) in that the latter has single acicular setae 
in neuropodia in posterior segments. 
CIRRIFORMIA CAPILLARIS (Verrill) 
Cirratulus capillaris VERRILL, 1900, p. 653. 
Cirratulus tenuis WEBSTER, 1884, p. 323 (U.S.N.M. No. 4797; Bermuda) (not C. 
tenuis Verrill, 1873). 
The single specimen of C. tenwis (U.S.N.M. No. 4797) is small, 
much contracted, with proportions as given by Webster. The pros- 
tomium is short, anteriorly rounded, without eyes. Dorsal branchiae 
arise, In a pair of crowded clusters, between the fourth and fifth 
setigers; the scars number 10 or more on a side and leave bare a 
short, median space. Lateral tentacles first arise from a point dorsal 
to the notopodial ridge, but in median and posterior segments the 
point of insertion moves progressively upward so that it comes to 
be nearly midway between the notopodium and the middorsal line. 
Notopodial and neuropodial setal structures have the same form and 
distribution as in (. capillaris Verrill, to which C. tenwis Webster is 
hereby referred. 
Family OPHELIIDAE 
Genus AMMOTRYPANE Rathke 
AMMOTRYPANE AULOGASTER Rathke 
FIGURE 14, 0b, ¢ 
Ammotrypane aulogaster RATHKE, 1843, pp. 188-190, 205-208, pl. 10, figs. 1-3.— 
FAUVEL, 1927, p. 183, fig. 47. 
Ammotrypane fimbriata VeERRILL, 1878, p. 604 (U.S.N.M. No. 8076; off Gay 
Head, Mass., in 25 fathoms). 
There are numerous specimens of A. fimbriata, labeled type (1), 
cotypes (2), and many others, all from various parts of New Eng- 
land, south to Long Island, in depths of 18 to 866 fathoms. Number 
of segments varies from 45 to 50. The body is slender, smooth. 
Branchiae are present from the second to the fifth last segment, 
number 40 or more pairs; they are simple, cirriform, extend distally 
far beyond the setal tips (fig. 14, c). Parapodia have a simple 
setigerous lobe and a longer, slenderer, ventral lobe. Setae are 
entirely simple, capillary. The anal end is provided with a long 
funnellike lobe, open ventrally, with a row of about seven pairs of 
filaments at the end, and a simple or slightly crenulate edge at its 
proximal end (fig. 14, 5). 
