new Species of Thamnodrilus. 159 
calciferous glands, which are digitiform and without an apical 
lobe, and the extent of the tubercula pubertatis and the 
genital papille is greater than in my species. There remains 
Th. columbianus, which seems to me to be rather nearer to my 
species, but still presents points of difference. I am uncertain 
whether to regard Michaelsen’s silence about the genital 
papilla as evidence that they fail in that species. On the 
other hand, the calciferous glands are quite as in my species, 
and the ‘‘cephalization”’ shown by the sete appears to be 
nearly the same. But Zh. columbianus possesses a longer 
strip of tubercula pubertatis, and the typhlosole, thongh 
large, is not identical with that described above by myself *, 
Some Notes upon Thamnodrilus gulielmi, Beddard. 
This species, originally described by myself as quoted 
above, has been examined by no other zoologist in so far as 
I am aware. But other zoologists—Rosa ft, Cognetti de 
Martiis ¢, and Michaelsen §—have referred toand commented 
upon my description. I have lately taken the opportunity 
of again examining, so far as external characters are con- 
cerned, the original specimens upon which my description 
was founded ; of these there are two fully mature individuals 
in the British Museum collection. I am greatly indebted to 
Mr. H. A. Baylis for facilitating my examination of these 
specimens. One of these two specimens is the one figured 
by me in my memoir upon the species || ; the otber is rather 
a smaller example, and shows a slight difference in the size 
of the anterior segments. In fact, in this latter smaller 
example the first four segments are equisized and considerably 
smaller than those which follow, while in the larger example 
of the Thamnodrilus the first three are small and the fourth 
is as large as those immediately following upon it. I quite 
agree with Rosa in regarding the peristomial segment of my 
original description as being really the two first segments of 
* Thamnodrilus columbianus is described by Michaelsen in the 
following :-——“ Zur Kenntnis der Geoscoleciden Siidamerikas,” Zool. Anz. 
xxiii. 1900, p. 53; “ Die Terricolen Fauna Columbiens,” Arch. f. Nature. 
Ixvi. 1900, p. 244; “Oligocheta” in ‘ Das Thierreich,’ 1900, Berlin, 
p- 489; ‘ Die Oligochzten Columbias” in ‘ Voyage d’Exploration scien- 
tifique en Colombia,’ Mém. Soc. Neuchat. Sci. Nat. vy, 1913, p. 22; “ Die 
Lumbriciden,” Zool. Jahrb. xli. 1917, p. 102. 
+ “Contributo allo studio dei Terricoli Neotropicali,” Mem. R. Acc. 
Sci. Torino, t. xlv. (ser. 2) 1895, p. 112. 
t Loe. cit. p. 202. 
§ Loe. ett. pp. 72, 125. 
|| Lue. cit. p. 155, fig. 1, p. 157, fig, 2, 
