252 
FRANK E. BEDDARD. 
from the ventral side. The twentieth segment has the whole 
ventral region enclosed between the lateral pairs of setae 
entirely devoid of glandular epithelium, which is only developed 
on the dorsal region of this segment. The more anterior 
segments, in like manner, have no development of glan- 
dular substance for the greater part of the ventral area. 
The seventeenth segment bears the apertures of the vasa 
deferentia, which do not correspond to the ventral setae, but 
are more ventrally placed. The apertures are situated on a 
tumid area which occupies the space lying between the setae. 
On the two following segments there are similar areas, but 
more distinctly marked off from the surrounding integument. 
Dorsal pores are present, but I could not ascertain where 
they commenced. 
On the eighth segment are the apertures of the single pair 
of spermathecae. These are closely approximated in the median 
ventral line, and open near to the anterior margin, as is so 
generally the case. The various layers which compose the 
body wall appear to have much the same structure in this as 
in other species of worms. Particularly noteworthy is the fact 
that the longitudinal muscular layer shows the bipinnate 
arrangement of its fibres which is so characteristic of some, 
although not of all, species of Lumbricus, and is found also 
occasionally in other genera. This is illustrated in fig. 6 of 
Plate XXIII. In the anterior part of the body the fibres of 
the longitudinal muscular coat do not show any such regularity 
in their arrangement. 
§ Alimentary Canal. 
The most salient fact in the structure of the alimentary 
canal of this Earthworm is the presence of two gizzards (fig. 
21) ; these are situated close together in consecutive segments, 
and are only separated by a very minute oesophageal portion, 
the calibre of which is not far short of that of the gizzards 
themselves; the segments occupied by the gizzards are 7 — 10, 
the mesenteries separating these segments from each other are, 
as is often the case, not obvious. It will be seen, therefore. 
