132 Mr. F. E. Beddard on the 
lies; but as the specimen is a unique one, I am not able to 
settle the position of the funnel quite definitely, as it would 
be probably necessary to cut sections. ‘The main fact, how- 
ever, to which attention is called is the occurrence of only one 
pair of testes and one pair of funnels. I believe that in all 
Perichete hitherto described there are two pairs. 
The atria are very compact and lie in segments Xvil.—X1x. : 
the horseshoe-shaped duct, which arises from the middle of 
the gland, is at first toler rably wide; just before the external 
opening it becomes exceedingly narrow and opens through a 
small globular sac on to the exterior. 
‘The ovaries are in the thirteenth segment. The single 
pair of spermathecx lie in the eighth segment; each has a 
single diverticulum, of a chalky-white colour owing to the 
contained sperm. 
Lhe only species of Pericheta with one pair of spermathecee 
are Perichata elongata, P. quadragenaria, and P. sangirensis ; 
but P. vitiensis differs from all of these in the possession of 
but a single pair of testes and vas deferens funnels. Is it 
identical with Grube’s P. subquadrangulus, which also comes 
from Viti? In this case, as with most of Grube’s species, it 
is impossible to distinguish the species from his data. 
(11) Acanthodrilus Schmarde. 
The single specimen of this species was found in fresh 
water at Rockhampton (? in Queensland). 
It measures about 60 millim. in length by 5 millim. in 
breadth. The clitellum occupies segments x11.—xvil., and is 
undeveloped ventrally ; the grooves between the clitellar 
segments are very evident; dorsal pores are present, but I 
could not ascertain where they commenced. Segments ili.—x. 
are annulate, the middle segments showing three annuli. 
On segments xvu. and xix. are the atrial pores, of which the 
anterior marks the ventral edge of the clitellum, and between 
segments vill /ix. a pair of spermathecal pores. 
The worm being much contracted and the internal organs 
softened I am not able to say so much as [ could wish about 
the anatomy of the worm. The notes that I am able to give, 
however, are quite sufficient to distinguish the species. The 
dorsal vessel is single; the nephridia are paired structures. 
A gizzard is present, but Tam not certain which segment it 
occupies ; after the gizzard come five thick mesenteries. 
‘Lhe only organs of which 1 am able to give an adequate 
account, and they are fortunately the most important, are the 
spermathece and the atria. 
