BISPIRA VOLUTACORNIS. 255 
One, two or three pairs of ocular specks on the outer edge. Body of moderate leneth (about 
four inches and eighty segments, Rathke), and ends in an anus, with pigment-specks ; two 
ovoid papillae beneath. Anterior region has nine bristled segments, but they may vary 
from five to eleven. Colour of the body brownish violet (De St. Joseph). Bristles of the 
Fic. 151.—Transverse section through the cephalic ganglia of Bispira volutacornis. cg., cephalic ganglia ; 
em., commissure ; d., cesophagus. 
anterior region golden and in two groups, viz., an upper series having long straight shafts 
and tapering tips, with narrow wings, and a dense brush of shorter forms with varying 
tips, some having tapered tips, with wider wings than the former series, whilst others form 
a “ knife-blade ”-tip in which apparently the wings are fused. In the caudal region the 
tips of the majority of the bristles are greatly elongated, and the shorter forms have serrated 
edges. The anterior hooks, which commence on the second segment, are avicular and in a 
Fie. 152.—Transverse section through the great nerve-cords in the anterior region showing their relation 
to the surrounding parts; cm., circular muscular coat; hyp., hypoderm; c., nerve-trunks ; nw.c., 
neural canals; vv., ventral blood-vessel. 
single row, with long necks, from which the main fang arises at less than a right angle, 
and has eight or nine small teeth above it. The base is short and abruptly tapers to a point 
posteriorly. The posterior hooks are similar but smaller. Tube similar to that of S. penieallus, 
with a thinner posterior extremity and fixed to stones. 
