REPORT ON THE ANNELIDA. 
419 
otherwise with the inner palese, for the outline of the latter, according to him, corresponds 
with a lateral view of the outer form just given, as a comparison of the figure 
will show (Schmarda, fig. 6, p. 23). 
The tip of the inner palese (PI. XXVIa. fig. 11) is bluntly pointed, then it graduallv 
expands into a large thick heel which projects beyond the somewhat slender shaft, so 
that the latter nearly forms the apex of a triangle, and the serrated upper or anterior 
edge the base. These are evidently modifications of the same type. In this case the 
outline resembles an attenuated leg with a long tapering foot furnished with a huge heel, 
the latter having the dorsal surface crenatecl. In one specimen an ovato-lanceolate leaf 
of an Alga is attached to one of the ventral palese, and overhangs the crown like an 
operculum. 
A little below the bases of the outer palese of the crown a closely set series of conical 
paplllse occur. These would seem to have been in life of a deep purplish hue, a colour 
which more or less tinges both dorsal and ventral surfaces of the animal. 
The cephalic branchise are numerous, about sixteen stems being visible on each side 
of the fork. 
The mouth has the usual structure, with a somewhat long cirrus on each side of the 
palpi, and a tuft of finely pennate bristles a little behind. 
The thoracic region has the typical three sets of bristles. The oar-shaped forms of 
the dorsal row have a smooth blade, which is tinted of a purplish hue distally. A high 
power shows only a few minute spines at the point of the most perfect examples. 
Schmarda gives an unsatisfactory figure of one of these (fig. d, op. cit.) with the tip 
broken, a condition doubtless A^ery common. It is too wide at the extremity, and the 
striae are placed too near the latter. The tip is more attenuate than in the preAuous 
species. Very few are quite symmetrical distally, and all have well-marked striae at 
intervals. The intermediate bristles likewise present a more attenuate tip than in the 
Sabellaria (Pallasia) johnstoni, and are much less spinous. The ventral tufts of bristles 
are also smoother than in the latter form, and slightly differ in the breadth of the 
fusiform region at the tip. 
The hooks (PI. XXVIa. fig. 12) have seven teeth and an indistinct process. More- 
over, as in many others, the teeth are in a double row, so that it is often difficult to see the 
hook in simple profile. 
The food in the alimentary canal is composed of sandy mud, numerous sponge- 
spicules, a few Diatoms and organic fragments. Many Gregarinse also occur in the 
intestine. 
The tube is a very dense one, composed of entire small shells, coarse fragments of 
shells, large sand-grains, and other structures cemented together by a tough secretion 
which also lines the interior. The latter is deeply tinted of a dull purple hue in many 
parts, yet this does not prevent the lining membrane from being semitranslucent, since 
