128 Mr. F. E. Beddard on the 
segments in their greater size. The posterior sete have the 
same irregular quincuncial arrangement which occurs in 
Pontoscolex corethrurus ; many of them are large; they vary 
in fact in size, but are never ornamented. 
With regard to internal structure this species shows certain 
differences from Pontoscolex corethrurus ; but they are not, in 
my opinion, sufficient to separate the two forms generically. 
The material was not in a sufliciently good state of preserva- 
tion to allow of anything like a complete account of even the 
macroscopic anatomy, and I did not think it worth while to 
attempt any section cutting. 
Thealimentary canal presents the same characters originally 
described by Perrier * in Pontoscolex (Urocheeta) corethrurus. 
The large gizzard is situated anteriorly, though I have not 
been able to fix precisely the segment or segments which it 
occupies. On each side of the gizzard is a large coiled 
“ olande & mucosité.””  Schmarda has mentioned the fact that 
the cesophagus is furnished with ‘4 braune_ birntérmige 
Organe,” which I take to be the calciferous glands or “ glands 
of Morren” as they are sometimes called. I count, however, 
six of them, 7. e. three pairs, as in Pontoscolew corethrurus. 
Behind the gizzard are four stout mesenteries. 
Behind these again lie two pairs of hearts. 
Of the genital organs only the spermathecee and the sperm- 
sacs were visible. I only found two pairs of spermathece, 
which lie behind the gizzard in the segment bounded by the 
two last thick mesenteries. Their form (see fig. 6) is rather 
different from that of the spermathece in Pontoscolex core- 
thrurus. Each consists of a reniform pouch connected with 
a long duct which leads to the exterior. ‘The sperm-sacs are 
tongue-shaped organs, as in Pontoscolex corethrurus. 
In the posterior region of the body the “ pyriform vesicles ” 
characteristic of Pontoscolex were present. 
(8) Diacheta littoralis, sp. n. 
(Pl. VII. figs. 4 and 5.) 
Pontoscolea arenicola, Schmarda, Neue wirbell. Thiere, Bd. i. Halfte ii. 
p- 11 (in part). 
Pontoscolex arenicola, Vaillant, Annelés, p. 198 (in part). 
This worm, like Diacheta Thomasti+, has eight sete 
in each segment, which alternate in position upon successive 
segments from the very first ; and, asin that species, the sete 
* “Etudes sur l’organisation des Lombriciens terrestres, Anatomie 
des Urocheta,’ Arch, Zool. Exp. t. iii. (1874) p. 331. 
+ Benham, “Studies on Earthworms, No. II.,” Quart. Journ. Mier. Sci, 
vol, xxvii. p. 89. 
