1886.] MR. F. E. BEDDARD ON A LARGE EARTHWORM. 175 
by the clitellum, but to differ from both this and A. odtusus in 
the position of the male generative pores. The genital sete of 
the 17th and 19th segments are almost exactly like those of 
A. ungulatus, but the prostate glands, asin A. obtusus, are cylindrical 
coiled tubes and not multilobate glands as in A. ungulatus ; at the 
same time the prostate glands in several examples of my species are 
so closely coiled that they present an appearance which might easily 
be mistaken for that which has been stated by M. Perrier to be 
characteristic of A. ungulatus ; it is just possible that the condition of 
the specimen dissected by M. Perrier may be responsible for the lobed 
appearance of the prostate glands. Another difference between my 
species and A, ungulatus is in the spermathecee, which can hardly 
be said to have a diverticulum, and are in segments 8 and 9, not 8 
and 10. The structures lying between the two spermathece of 
each side may, as I have already suggested, be identical with that 
described above, but evidently differ in detail. The most important 
difference between the species described here by myself and those of 
M. Perrier is undoubtedly in the position of the male generative 
pores ; in so many species—in fact in all except A. obtusus, A. verti- 
eillatus, and A. ungulatus—the male generative pores are upon the 
17th and 19th segments’. 
EXPLANATION OF PLATE XIX. 
Fig. 1. Acanthodrilus layardi; anterior region of body, dorsal aspect. 
2. Segments 13-20, from ventral side, to show position of female generative 
pores upon 14th, and the male generative pores upon 17th and 19th 
segments. The clitellum is indicated by shading. 
3. Genital spicule from segment 8, magnified. 
4. The lower extremity of the same, more highly magnified. 
5, Spermathece and accessory genital glands: cp, spermathece ; v, ventral 
blood-vessels giving off branch to the spermatheca ; a corresponding 
branch is also given off from lateral heart; s, sac containing modified 
setae (figs. 5, 4); g.6, glandular bodies opening in common with seta 
sac; 7, glandular tufts of nephridium ; 2’, duct of nephridium. 
. Anterior region of body dissected : cp, spermathece ; 7, nephridia. 
. Principal vascular trunks of anterior region: d, dorsal vessel ; s7, supra- 
intestinal; v, ventral ; 7, lateral; , ‘ hearts.” 
bee Or) 
' Referring to my paper already quoted upon the New-Zealand species of 
the genus, I find that the male generative pores are there stated to be upon the 
16th and 18th segments. A reexamination of the specimens has convinced me 
that that statement is wrong, and that they are, as in the present species, upon 
the 17th and 19th segments, while the spermathecs are in the 8th and 9th seg- 
ments as indicated in the woodcut (P. Z. S. 1885, fig. 1, p. 815). 
Should the specimens to which the present note relates prove to belong to a 
distinct species from either of those described by Perrier, I propose to term the 
species Acanthodrilus layardt. 
