1906 
vSoL'THKRN. — Notes 071 Evchytrceiis. 
anastomose, as has been stated by M. Rolsius', to be the case 
in other Enchytraeids. If the nephridia are studied in the 
living worm, patches of cilia may be seen in active motion in 
several parts of the lumen. (Fig. 5, c). 
The spcnnathcac lie, as usual, in the fifth segment. (Fig. 
3, d, Fig. 6). They vary very much in form and size, according 
to their state of maturity. The shape of preserved specimens, 
also, is ver}' different from that of the living Avorm, The 
mature spermatheca consists of three parts (Fig. 6, A). There 
is a narrow duct {b) leading into the oesophagus, an extreme!}' 
large, spherical, transparent amj^ulla (r), coloured golden- 
yellow by the contained sperm, and a duct {e), leading to the 
exterior, between the 4th and 5th segments. The latter duct 
is thickly covered with small glands along its whole length. 
It is nearly equal in length to the ampulla, and twice as long 
as the duct leading into the oesophagus. Fig. 6, B represents 
an immature spermatheca. When mature, the spermathecae 
are very conspicuous, and the ampulla is much larger than 
that of Efichyfrceus albidiis. 
The testes, when ripe, fill segments 9, 10, and ir. The 
sperm fumiels (fig. 7) are three to four times as long as broad. 
The mouth is coloured golden-brown with sperm {a). The 
lip (r) is very conspicuous. The speriii dticts are very long, 
extending back sometimes to the 20th segment. They 
open to the exterior on segment 12. The ovaries are in 
segment 12. 
The following characters serve to differentiate this species 
from all others : — 
Length, 10-15 mm. Thickness, o-25-o-5 mm. Number 
of segments, 45-48. Setae usually 3 in each bundle, never 
more. Brain twice as long as broad, slightl}' concave or 
straight behind. Peritoneal cells of gut large, and full of 
oil drops. Anteseptal part of nephridiuni consisting only of 
the funnel. Spermathecae with large ampullae, the duct 
covered with glands. Sperm funnel 3-4 times as long as broad. 
Enchytrmis sabjilosus is most nearly related to E. albidiis, 
though it occupies a very central position in the genus. It 
differs from the last mentioned worm (i.) in the number of 
1 ^fefn. d. Acad. Pont. d. Nuovei Li met, vol. ix , 1893. 
