SOME LITTORAL OLIGOCHATA OF THE CLYDE. Df 
while, nearer the middle line, it is completely double (fig. 12, b). It is attached by two 
thick strands, composed of cells with large oval nuclei, to the dorso-lateral body-wall. 
A portion of the strands, which are so disposed as to be one anterior and one posterior, 
passes internal to the gland ventrally to be inserted into the ventral body-wall; the 
glands are thus to some extent bound down by the strands. JDorsally the strands 
split up and radiate to their attachments. 
The ovaries have the usual position. Ova are found in segments xii. and xiii. 
The spermathece in segment v. are not large, and have the form of an elongated 
spindle, somewhat bent on itself. The communication with the cesophagus is narrow. 
Gland-cells are disposed in radial masses round the external aperture. There is no 
distinction of ampulla and duct to be made out in the entire animal; sections, however, 
vd. 
te 
\ 
9 GRA Aah = 
OSS OO TA & \O 
eee aw Se fele\ 
a Fie. 12. b 
a, longitudinal section through outer part of penial b, a similar section, a little internal to the previous 
gland of the same. one. The penial gland here appears double. 
m., muscular (cellular) strands attaching penial gland to body-wall; m.1, muscular covering of gland itself; v.d., vas 
deferens before entering the gland. 
show a small ampulla with thin walls, and a much longer and thicker walled duct, with 
a fairly wide lumen (PI. II. fig. 13). The walls of the duct are composed of columnar 
cells, and appear markedly transversely striated in the living condition (PI. II. fig. 14). 
It is possible that the ampulla would be relatively larger if it were swollen by 
spermatozoa ; none of the organs in my preparations, however, contain any. 
Copulatory glands (‘ Bauchmarkdriisen”) are well marked in segment xv.; the 
mass of cells closely invests the cord, and projects upwards on each side above the level 
of the cord; there is, in longitudinal sections, a small papilliform projection of the 
surface of the body at the level of the middle of the gland. 
In xiv. the copulatory gland is smaller, but still projects on each side above the 
level of the cord. In segments anterior to this, from xi. to ix., the cells around the 
cord in the posterior part of each segment appear to be of the same nature, as evidenced 
either by the papillary projection on the surface or by the fact that the cells penetrate 
the muscular layers of the body-wall to become continuous with the surface epithelium. 
