1903.] NEW SPECIES OF EARTHWORMS. 213 
descending limb of the oviducal loop, which constitutes the 
“ Hitrichterblase” of Michaelsen. No communication between 
this short diverticulum of the oviduct and the general eccelomic 
cavity could be detected. Evidently, however, it is the forerunner 
of the funnel which opens into the fully developed receptaculum, 
or, possibly, of both. It is noteworthy that the oviduct 
is divisible into two regions. ‘The section lying nearest to the 
spermathecal sac is of a wider calibre than that lying nearer to the 
external orifice. Furthermore, the lumen of this wider section 
is a straight tube, while the lumen of the narrower section of 
the oviduct is sinuous in its course within the muscular sheath. 
It is possible that the wide straight section is really to be looked 
upon as a greatly drawn-out funnel, drawn out by reason of the 
growth of the spermathecal sac. 
The walls of the oviduct, as is the case with other Eudrilide, 
are very stout and muscular; and attention has already been 
called to the fact that part of the oviducal tube runs a sinuous 
course, independent, therefore, of its muscular covering. ‘These 
facts, coupled with the conditions obtaining in Hudrilus ', where 
the oviduct runs for a considerable space actually within the 
septum, lead me to consider that the muscular wall of the oviduct 
in Stuhlmannia may be a purely adventitious sheath, not belonging 
to the oviduct at all, but consisting chiefly of the otherwise 
missing septum between segments xiii./xiv. Its continuity with 
the receptaculum can at any rate be explained on this view, which 
is in any case not at variance with the other facts to which I have 
just called attention. 
The present species, in correlation, it is to be presumed, with 
the entire absence of a penial process, does not possess the median 
unpaired bursa propulsoria which characterizes S. variabilis. In 
the former point possibly, but not certainly, it agrees with 
S. gracilis. Dy. Michaelsen states, only as a possibility, since he 
only examined two specimens, the absence of a copulatory process 
in S. gracilis; furthermore, a thickening of the integument of 
segment xv. appeared to him to be possibly intelligible as a not 
fully developed penis. With regard to the presence or absence of 
a bursa propulsoria he is silent. Stuhlmannia michaelseni, however, 
cannot be confused with S. gracilis by reason of the characters 
of the penial sete. They are provided at the end with a row of 
sharp denticles on either side as in S. variabilis. In short, I 
think that a case has been made out for the creation of a new 
species of this genus Stuhlmannia. 
Bettonia lagariensis, n. g. & sp. 
Of this apparently new genus and species [ have examined but 
a single specimen, complete and sexually mature. It measures 
90 mm. by 4-5 mm. in breadth. The colour is bluish violet. It 
1 Beddard, “On the Gonad Ducts and Nephridia of Eudrilus,’ P. Z.S. 1902, 
vol. ii. p. 89. 
