REPORT ON THE ANNELIDA. 
201 
the tail, though to a less degree than anteriorly. The entire body, from the middle of the 
second segment backward, as well as the bases of the feet, is filled with ova, each of which 
shows germinal vesicle and spot. The anterior segments are provided with bristles of the 
same type as the parent stock (PI. XVa. fig. 18), only the terminal a23|)endage is 
more differentiated. None of the long simple bristles are apparent in this frag- 
mentary example. 
Exactly opposite the point from which the pedicle of the foregoing bud arises is 
another small one, consisting of upward of a dozen segments. Moreover, in the same 
specimen, a pair of young buds occur opposite each other. In these cases the segment of 
the intestine of the parent-stock, from which the diverticulum proceeds, is shorter than 
the rest. It would seem that the bud arises opposite a foot, and there is no evidence 
that it ever springs between two (successive) feet. The shortening of the intestinal 
segment may be due to the appropriation of the substance of both it and the body-wall 
in the production of the new bud. 
A free female bud, again, occurred in one of the basal canals of the sponge. It 
(PL XXXIVa. fig. 9) closely agrees with the description of the previous specimen, ex- 
cept in the larger garnet-tinted eyes, the dorsal and ventral pairs being more nearly equal, 
and the presence of beautiful tufts of long simple bristles (the “ Pubertatsborsten ” of Prof. 
Langerhans) in each foot. Its length is about 9 mm., and its breadth, including the 
bristles, rather more than 2 mm. There are twenty-nine segments, but the condition of 
the tail is open to doubt. Dorsally (PI. XXXIII. fig. 12) each segment has a slender 
and distinctly jointed cirrus. Beneath the foregoing is a dense tuft of long, translucent, 
simple bristles, with broad flattened tips after the fashion of the straight Koman swords, 
but marked at the tip by two peculiar longitudinal processes, and sometimes the end 
assumes a fimbriated appearance (PI. XVa. fig. 19). The setigerous region beneath is 
short and conical, having superiorly the spine and interiorly the bristles, which differ 
from those of the parent-stock in showing a more evident differentiation at the junction 
of the terminal process. Yentrally is a tongue-shaped cirrus, which nearly reaches the 
apex of the setigerous region. The entire body is filled with ova, which likewise occupy 
, the feet almost to their tips, the first segment and the extremity of the tail (which is 
I apparently in process of regeneration) alone being devoid of them. Some of the feet, 
I indeed, assume a bulk four or five times larger than the others, from distention wnth ova. 
, The latter apparently have embryos internally. 
! Another free female bud (PL XXXIVa. fig. 10) amongst the specimens from the 
Arafura Sea, differs somewhat from the foregoing, and probably represents a younger 
stage, though the example has thirty-one segments. It is not in good preservation. 
; Instead of the smooth, bifid snout and two large eyes, the anterior margin presents no 
! notch anteriorly, while a minute cirrus appears on each side. The eyes are small and 
j wide apart, and a similar pair occur ventrally. The ova are smaller (less developed) 
(ZOOL. CHALL. EXP. PART XXXIV. 1885.) LI 26 
