REPORT ON THE ANNELIDA. 
17 
especially in the posterior half of the animal. About the middle of the body the 
structure of the tip of each bristle resembles that in PI. Ia. fig. 13. The long limb 
beyond the fork has serratures like those seen in the corresponding region of the dorsal 
bristles, and the shaft is extremely long, nearly cylindrical for the greater part of its 
length, and terminates interiorly in a pointed extremity, as formerly indicated in 
the dorsal bristles. Moreover, the same shortening of the tips anteriorly and the elonga- 
tion posteriorly characterise the ventral bristles. In the posterior bristles the longer 
limb of the fork is in many shghtly curved inward at the tip. 
At the inner margin of the dorsal bristle-tuft, and a little in front and to the exterior 
of the branchia is situated a long fihform cirrus, which is tinted brownish-green superiorly, 
such forming a distinction, therefore, between this form and Chloeia. Another cirrus, the 
homologne of that in Chloeia, springs from the posterior part of the dorsal bristle-papilla, 
and like the former is extremely long and attenuated, with the pigment placed distally. 
The ventral cirrus occurs in its usual position, viz., rather below and behind the ventral 
bristle-tuft. It is also furnished with pigment distally. 
"When dredged up, it was referred {vide Atlantic, vol. i. p. 176) by Dr. v. Willemoes 
Suhm to the family Amphinomidae, sub-family Euphrosyninae, with many of the char- 
acters of the genus Euphrosyne. It approaches Grube’s genus Notopygos in general 
configuration, and in the presence of the branchial cirrus, but differs materially in regard 
to the structure of the branchiae and the nature of the bristles, both of which show a 
nearer approach to Chloeia. In the present unsatisfactory condition of the Chloeia group, 
and though Kinberg’s description of the genus can hardly be followed, I have thought it 
best not to make a new genus, but to place it under his Chloenea} In the structure of 
the body-wall and the arrangement of the nerves it agrees with Chloeia. The perivisceral 
corpuscles are largely developed, and the wall of the stomach is loaded with refracting 
cells and granules, the contrast between this region and the more rigid intestinal canal 
with its lobose and more translucent glandular papillae being well marked. 
Notopygos, Grube. 
Notopygos megalops, n. sp. (? crinitus, Grube, var.) (PI. I. fig. 1 ; PI. IIa. figs. 3, 4). 
Habitat . — Dredged at Station 36 (off the Bermudas) April 22, 1873, in 30 fathoms, 
amongst coral. 
The body is about 9 mm. in length and 3 mm. in breadth, is fringed by a dense series 
of pellucid bristles, and consists of about nineteen segments besides head and tail. The 
segments are distinctly marked, those in the middle of the body having the greatest 
antero-posterior diameter, as in the previous form. 
1 Op. cit., p. 86. 
(ZOOL. CHALL. EXP. — PART XXXIV. — 1885.) 
LI 3 
