412 W. C. M'INTOSH ON THE ANNELIDA 



short papillae with globular heads, the distal margin being generally truncated. At the 

 anterior and outer angle of the scale a few very short and somewhat globular papillae 

 occur on the anterior edge. The outer border, again, is occupied by a series of emi- 

 nences, from each of which springs a series of long papillae (PI. LXXIII. fig. 10, the 

 figure showing the first four papillae), the short clavate warts of the anterior border 

 being also continued in the intermediate space and over the surface. The first eminence 

 (to the left in the figure) occupies the anterior angle, and has four long papillae ; the 

 others follow, to the number of nine or ten, the last merging into the ordinary ciliated 

 posterior border. The eminences vary in size ; and the papillae thereon range from one 

 to ten in number. Moreover the latter are considerably larger than the ordinary pa- 

 pillae on the scale ; and a process (nerve or vessel) passes from the scale into the centre 

 of each. The dorsal sm-face of the scale has many dark grains ; and minute specks also 

 occur on the cilia. The third scale has its anterior and outer angle more produced, 

 thus extending the outer border, which has thirteen or fourteen eminences with papillae, 

 each increasing in size from before backward, though solitary papillae occur between 

 the eminences after the twelfth, thus by degrees linking them to the ciliated posterior 

 border. 



The scales gradually become shorter and rounder (though still reniform), and the cilia 

 longer ; while the eminences on the external border are fewer though more prominent, 

 and with a larger number of papillae. In some specimens eight or ten of the anterior 

 scales are quite pale, covered with ordinary sand-particles, so that they are very rough, 

 the last, however, becoming gradually darker. The first three pairs meet in the middle 

 line of the dorsum ; the rest are widely separated. The anterior portion of the dorsum 

 is smooth ; but by-and-by the surface is rendered rough by sand-particles, which, again, 

 are frequently coated with black pigment. The under surface of the body varies in like 

 manner — in pale specimens of a sandy hue, in dark specimens blackish. It is smooth 

 in front, but thereafter covered with minute papiUae, which in the dark specimens are 

 black. A parasitic Loxosoma occurs on the scales. 



The first foot (which is directed forward) bears dorsally two dense tufts of long delicate 

 hairs with an intermediate spine, each bristle being furnished with whorls of long spikes. 

 Ventrally is a series of stronger bristles with long tapering shafts, having whorls of spikes 

 and a slender smooth terminal piece tapering to a fine point (PI. LXXIII. fig. 11, one of 

 the superior ventral bristles). Towards the ventral edge of the foot the bristles become 

 much more slender, and, instead of having most of the shaft covered with whorls of spikes, 

 there are only ten or twelve at the distal end : a progressive decrease in this respect, indeed, 

 occurs from above downward. The bristles have the same long needle-like terminal 

 process. Just below the exit of the spine a long clavate process of the foot, like a 

 short cirrus, occurs. The ventral cirrus is long and subulate, with a peduncle at its 

 base. Both divisions of the foot are short ; and the superior is furnished with a thin 

 and broadly lanceolate lamella on its upper border, so that the lobe has a bifid appear- 



