REPORT ON THE ANNELIDA. 
263 
teeth ; the right six. The left lateral paired plate has about five teeth, and an accessory 
plate with a blunt tooth at the outer end. The left lateral unpaired plate appears to have 
six or seven teeth, but its position in the preparation makes the description uncertain. 
The right lateral has seven or eight teeth. The 
spathulate processes posteriorly are broad and 
comparatively blunt at the end. The mandibles 
(Fig. 27) have long slender shafts and ovoid 
dentary surfaces. 
The first foot is well developed, and has both 
a dorsal and a ventral cirrus. The tenth shows a 
stout dorsal cirrus, placed near the base of the foot; 
then the setigerous lobe with its brownish spines, 
bearing superiorly a series of simple tapering 
and brittle bristles with narrow wings, followed 
inferiorly by the compound forms. The tips of 
the latter are boldly bifid, and the articulation, Nematmereis- 
with the dilated end of the shaft, is clearly defined. Nertmtonereis schmardce; X 55 
The inferior cirri of the anterior region of the body 
quite diverge from their successors, and, indeed, give a character to the part. This 
ventral lobe or enlarged cirrus forms a rounded terminal mass, best marked from the third 
to the thirteenth segments, though it is present from the first to about the seventeenth foot. 
At the thirtieth foot (PI. XXXVII. fig. 7) the small ventral cirrus (which is some- 
what cylindrical) is well formed, and continues to the posterior end of the frag- 
mentary specimen. The simple bristles (PI. XVIIIa. fig. 16) are longer and more 
slender than in the tenth foot, and show narrow wings. The dorsal cirrus is somewhat 
fusiform, narrow at the base and tapering at the tip. The points of the brownish 
spines project beyond the soft part of the foot, but there is no differentiation of the 
extremities as posteriorly. One or two translucent brush-like bristles occur superiorly. 
The curvature of the compound bristles (PI. XVIIIa. fig. 17) is peculiar. 
At the fiftieth foot the upper, and stronger, brownish spine (PI. XVIIIa. fig. 18) 
shows indications of a curiously hooked tip with a chitinous guard or wing. This 
feature is still more distinctly marked in the posterior segments ; the arrangement of 
the other parts, however, being similar (PI. XXXVII. fig. 8), as, for instance, the 
structure of the brush-shaped bristles (PI. XVIIIa. fig. 19). A pigment-spot appears 
posteriorly at the base of each foot, at the origin of the dorsal cirrus. In the anuerior 
region of the body this spot occurs near the tip of the setigerous process. 
The specimen is a male, the body-cavity being distended with sperm-ceUs. The 
united nerve-cords are large and rounded, and no sign of a neural canal occurs. The 
greater part of the cord projects freely into the perivisceral cavity. 
