102 
PRANK E. EEDDARD. 
Acanthodrilus annectens, n. sp. 
This species combines to a certain degree the characters of 
two other New Zealand Acanthodrili recently described by 
me (1), viz. A. multiporus and A. no vse-zeal andise ; not, 
however, to so marked an extent as might lead one to infer 
the possibility of its being a hybrid. 
It is a comparatively small worm, measuring about 3 
inches in length. The colour of the living worm is “ pink, or 
white and pink.” 
External Characters. 
The setse are paired, the individual setae being at some 
little distance from each other. 
The Clitellum occupies segments 13 — 20 (inclusive) ; the 
glandular modification of the epidermis is not developed on the 
ventral surface, as is usual in this genus. 
The anterior end of the body is somewhat swollen, and the 
segments here are somewhat difficult to map owing to the 
division of the segments into numerous annuli. In these 
particulars the present species agrees very closely with A. 
multiporus. 
The atrial pores are upon the seventeenth and nine- 
teenth segments, and correspond in position to the outermost 
of the ventral pair of setse. They are placed upon the summits 
of prominent papillae; the two pores of each side are connected 
by a groove. In one specimen the pore of the vasa deferentia 
was visible upon the eighteenth segment. As a rule these 
pores are invisible. 
The oviducal pores are paired, and lie upon the four- 
teenth segment ; each is placed in front of, and a little to the 
inside of, the ventralmost seta of the ventral pair. 
The spermathecal pores are in the furrows separating 
segments 7 — 8 and 8 — 9; they correspond in position to the 
atrial pores. 
The neph ri diopores are visible in most of the segments of 
the body ; they lie in front of the outermost seta of the outer pair. 
