Some New or Little Known Oligocheta., 33 
II. Microscolex nova zelandig, n. sp. 
Length, 42 mm.; breadth, 2 mm.; number of segments, 76. 
The prostomium is continued over about half of the buccal 
segment. 
The clitellum extends 
over segments xili.-xvii., and is 
complete save for a small ventral tract posteriorly. The 
clitellum is marked pos- 
teriorly by a triangular 
notch having the form 
and extent shown in the 
accompanying — illustra- 
tion (Fig. 1), which is 
occupied by the male 
genital pores and by cer- 
tain papille. The male 
pores are small orifices 
with an obviousand thick 
chitinous lining. They 
are situated about half 
way from either end of 
the layer of unmodified 
epidermis, which here in- 
vades the clitellum close 
to its margin. They are 
exactly on a line with 
the innermost seta of the 
ventral pair. These sete, 
as already mentioned, are 
absent from the xviith 
segment which bears 
these pores. In front of 
the male pores is a single 
median papilla, behind 
xvi 
XVII 
Fig. 1. 
Ventral view of segments in neighbourhood 
of genital orifices. The clitellar segments 
are numbered with Roman numerals ; 
N.p., nephridiopores; g, male pores; 
g-p., genital papille. 
them are a pair of similar papilla, which lie somewhat to the 
inside of the male pores. The seta are in four series of 
pairs, the individual setze of each pair being not very close 
together. They are unornamented. 
The nephridiopores are in front of seta 3. 
VOL, XII. 
