298 LAGISCA FLOCCOSA. 



extend along the outer border, and also form a group in the neighbourhood — within the 

 anterior edge. The anterior border of the scale is smooth, with the exception of an 

 isolated group of one to five or more long cilia some distance from the outer edge. The 

 entire surface of the scale is densely studded with minute spines, smallest in front and 

 increasing in size posteriorly. The developing scales are of various degrees of smooth- 

 ness, the youngest being quite smooth. 



Both dorsal and ventral divisions of the foot bear a long pointed process for the 

 spine. The dorsal division has characteristic bristles (right of Fig. 22), which somewhat 

 approach those of Harmothoe haliaeti, though quite distinct. They are of considerable 

 length, slightly curved, and not much tapered at the tip, which, indeed, ends in a short 

 blunt cone, and in some shows a slight fold or differentiation on the spinous side. The 

 short bare cone at the tip is much broader than that of H. haliaeti, and has a different 

 character. The spinous rows so nearly approach the tips that they in some almost 

 reach as far as the point of the bristle, and are as close as in the species just 

 mentioned. The ventral bristles (left of Fig. 22) have somewhat slender shafts, spinous 

 tips of the average length, and a long and rather broad terminal region with a well- 

 marked hook. The ventral line of the smooth tip is slightly convex. 



The dorsal cirri are of considerable length — with a filiform tip. They are densely 

 covered with long cilia having probe-pointed tips. The ventral cirri have only a few 

 scattered and very short clavate cilia. 



This fine species appears to be confined to deep water. 



Genus XL — Lagisca, Malmgren, 1865. 



Body rather narrow, attenuate posteriorly. Cephalic lobe produced into lateral 

 peaks. Lateral tentacles attached below the median. Eyes four; two lateral Justin 

 front of the middle line, two in front of the nuchal border. Scales fifteen, covering the 

 dorsum— except the last few. Bristles of the dorsal lobe with acute tips and finely 

 serrated. Bristles of the ventral lobe simple superiorly and inferiority, rest bidentate,. 

 and all with long spinous rows. Papilke of proboscis f. Two slender cseca go forward 

 into the peripharyngeal space. Segmental (nephridial) papilla commences as a minute 

 process on the fifth foot, and extends nearly to the last foot. It is much smaller than in 

 Harmothoe. 



1. Lagisoa floccosa, Savigny, 1820. Plate XXVI, fig. 2. 



Specific Characters. — Body rather narrow throughout, slightly diminished anteriorly,, 

 and much more so posteriorly. Median and lateral tentacles, and the tentacular cirri 

 rather short, densely ciliated and with filiform tips ; little or no enlargement below the 

 latter. Byes large, posterior in front of the nuchal border ; anterior lateral in position, 

 and just in front of the middle line. First pair of scales rounded, the others reniform or 

 somewhat ovate, mottled greyish brown, often with a white spot in the centre, densely 



