304 LAGISCA ELISABETHS. 



belt runs from this forward in the median line to the base of the tentacle, which is 

 blackish ; and the anterior areas of the head thus mapped off are brownish red, with dark 

 grains along the edges. The anterior pair of eyes are lateral, lying in front of the 

 brownish-red border of the region. The posterior pair are large, black, widely separated, 

 and situated on the pale band of the region. The median tentacle is absent. The 

 lateral tentacles are short, brownish at the base, with a filiform tip, and furnished with 

 long clavate cilia. The palpi have a dense series of minute papilla^ with enlarged tips. 

 The tentacular cirri have a blackish patch at the base, a light brownish one in the 

 slightly dilated portion near the tip, then a whitish ring, and lastly, a dark brownish 

 one at the base of the filiform termination. They possess long cilia with globular ends. 



Body. — The body is typical, that is, slightly narrowed in front, more so posteriorly, 

 about 13 mm. in length, and mottled with blackish pigment on the dorsum in a 

 remarkable way. The dorsum of the first four segments is mainly blackish, then each 

 segment presents near the posterior border a median bar, which by-and-by becomes a 

 speck. Symmetrical touches of pigment mark the lateral regions of each segment, and 

 two blackish specks occur on the base of the foot. A well-marked median band of 

 black characterises the dorsal lip; the ventral surface is otherwise pale. The pale scale- 

 pedicles are very distinct, and proportionally large. 



The dorsal cirri agree in colour with the tentacular cirri, and besides the longer cilia 

 with globular ends on the column of the organ, shorter cilia proceed upwards rather 

 beyond the lower third of the extremity. The ventral cirrus is subulate, with sparsely 

 distributed and short clavate papillae. The first has a dense coating of cilia, with large 

 globular tips. 



Scales (Plate XXXII, fig. 6) probably fifteen in number, though the last pair 

 had disappeared in the specimen. The first pair are rounded, densely spinous, and 

 ciliated almost entirely round ; the cilia being longest externally, and with characteristic 

 globular ends. The rest of the scales are more or less reniform, becoming ovate pos- 

 teriorly. The general colour of the scales is dark greyish with a blackish patch in the 

 centre, the pigment being broken into fragmentary portions. The outer and posterior 

 edge is ciliated, as indeed is the greater part of the circumference. They commence as 

 short, almost baccate processes, and towards the outer edge are more elongate, the 

 extremities being nearly globular, the series again diminishing to terminate in short 

 papillae. With the exception of the covered portion of the scale the surface is densely 

 covered with minute and rather blunt spines, a few of which towards the outer and 

 posterior edge become larger acute processes, or bluntly conical papillae. A considerable 

 portion of the inner region of the scale is curiously reticulated, so that the spines are 

 grouped in areas — a condition visible under the lens as well as the microscope over the 

 greater part of the scale. The anterior and outer border has larger spines than those 

 on the general surface, as shown in the figure. From the extreme roughness of the scale, 

 mud and debris lodge in the crevices. 



Feet. — The first foot has two curved bristles which correspond in structure to the 

 dorsal type, though the smooth tips are somewhat broader. 



The dorsal bristles of the second foot are nearly typical, except that the smooth tips 

 are larger. The ventral are more slender than the subsequent forms, but show a bifid tip. 



