HARMOTHOE. 313 



It is characterised by the long and strong dorsal bristles (Plate XXXVII, fig. 28), 

 which almost reach as far as the tips of the ventral. They are for the most part stiff, 

 straight, and gently tapered bristles, those at the inner edge of the tuft being shorter 

 and slightly curved. The spinous rows are well marked from a short distance above 

 the free edge to the extremity, which is pointed and smooth. The ventral division of 

 the foot is less acute than in front, the tip being almost fan-shaped, with the spine at the 

 upper border. The bristles have long straight shafts, while the tips are slightly dilated 

 at the commencement of the spinous region, have somewhat short bare tips of moderate 

 breadth, a well-marked hook at the extremity, and in some, especially at the upper 

 third of the series, a minute spur beneath (Plate XXXVII, figs. 29 and 30). The 

 great density of the dorsal bristle-tufts gives the animal a woolly appearance, and in 

 some they are tinted of a ferruginous hue from adherent growths. The ventral cirrus 

 does not reach the tip of the fleshy part of the foot, and has short clavate cilia. 



In the terminal feet a similar condition to that in front exists, though the dorsal 

 bristles as a whole are more tapered. Their spinous rows are very distinct. The 

 ventral bristles in the last foot are attenuate. Parasitic algse are frequent on the 

 bristles. 



The segmental (nephridial) papilla becomes distinct about the sixth foot. 



Reproduction. — One example (Canon Norman's) from Norway, in July, 1878, shows 

 numerous ova in the perivisceral space. 



The presence of a minute tooth below the tip of the ventral bristles shows the 

 proximity of the present species to the genus Harmothoe and its allies. This spur had 

 escaped the notice of Malmgren. 



It is allied to Harmothoe areolata, Grube, but the latter differs in the more regular 

 arrangement of the surface of the scale, the fewer though larger and less acute spines, 

 the exquisite reticulation around them, and the much more numerous cilia of the outer 

 and inner borders. It seems to be rare in Britain, though the example from the Clyde 

 is of comparatively large size. 



Acanthicolepis asperrima was first described by the elder Sars from specimens pro- 

 cured a few miles north of Bergen, a region which has been rendered classic to zoologists 

 by his labours and by those of his successors. Recently no one has done more in 

 collecting the annelids of the same region than Canon Norman. 



Genus XIII. — Harmothoe (Kinberg, 1857), 1 char. em. 



Body not much elongated. Lateral tentacles fixed below the median. Palpi with 

 rows of minute truncate papilla3. Eyes four ; two at the peaks in front, two posterior 

 on the dorsum in front of the collar. Scales fifteen pairs, covering the whole of the 



1 Kinberg described the genus thus : — Cephalic lobe narrow anteriorly. Base of the tentacle 

 occupying the fissure of the cephalic lobe. Bases of the antennae fixed under the base of the tentacle, 

 Pharynx with f papillae and jaws. Elytra fifteen, covering the dorsum to the end of the body. 

 Body not long. 



