338 HABMOTHOE FRASER-THOMSONI. 



and inner half studded with small horny papilla, outer and posterior areas have 

 sparsely distributed, large tubercles, with an interrupted row along the posterior border. 

 Dorsal bristles stout, moderately long, and slightly curved, with closely arranged spinous 

 rows and a short, smooth tip. Ventral bristles bifid, the secondary process coming off 

 at an angle. Dorsal cirri appear to be fusiform — from the gradual nature of the 

 dilatation and the long filiform tip, and have clavate cilia. Ventral cirri slender, with a 

 few clavate cilia. 



Synonyms. 

 1885. Harmothoe Haliaeti (partim), Mcintosh. l Challenger ; AnneL, p. 96. 

 1896. „ Fraser-Thomsoni, Mcintosh. Sc. Proceed. R, Dub. Soc, vol. viii, n. s., p. 401. 



. { [ f\ Habitat.— Dredged in the 'Knight Errant' in 1880, in the Atlantic, at a depth of 



fifty-three fathoms, and procured by Prof. Haddon in the Royal Irish Academy's 



Expedition, July 15th, 1886, in ninety-three fathoms off the south-west coast of Ireland 

 — along with Malmgrenia castanea, which occurred on Spatangus raschii. 

 ^ ^ The head (Plate XXVIII, fig. 7) somewhat resembles that of Lagisca, having a pair 



of well-marked and widely separated eyes posteriorly, and a larger pair still more widely 

 separated on the anterior lateral prominence, looking laterally and dorsally. Both pairs 

 are conspicuous from the dorsum. The head terminates anteriorly in sharp peaks on 

 each side of the median tentacle. The lateral are brownish, subulate, and with a long 

 filamentous tip. The palpi appear to be of moderate length, and to have rows of minute 

 papilla3, but they had been dried. 



The body is of moderate breadth and of considerable length, narrowed abruptly in 

 front, but — from the middle — gradually diminishing posteriorly. The bristled segments 

 seem to amount to thirty-nine or forty. The brownish pigment of the dorsum posteriorly 

 is very prettily arranged in lozenges and touches, as often seen in species of Lagisca. 

 The lateral eminences for the segmental apertures are well marked, and a small papilla 

 projects between the feet. 



The scales (Plate XXXII, fig. 11) number fifteen pairs, and are thin, translucent, and 

 cover the dorsum. The first pair are small, rounded, and studded with minute 

 spines and tubercles. Few seem to be reniform, the majority being ovoid. The border 

 is smooth throughout. The anterior and inner half is densely covered with small horny 

 papillas or tubercles, while the outer area and that behind the scar for the pedicle have 

 large tubercles sparsely distributed. The small tubercles are grouped with a few 

 larger spines along the outer edge, while the posterior border is marked by about eight 

 large blunt spines or tubercles. Some of the latter under pressure project a little 

 beyond the posterior border, but no trace of cilia exists. Such scales thus differ quite 

 from those mentioned by Mr. Hornell, so that two species are involved. The scales are 

 mottled with brown, best marked round the scar for attachment. 



Feet. — The first foot is not in a condition for description. 



The second foot presents a dense tuft of short, strong, and very slightly curved 

 dorsal bristles with smooth tips, and distinct though closely arranged spinous rows. 

 Ventral cirri somewhat tumid at the base, and with a few comparatively long cilia. 



