586 JOURNAL OF SCIENCE 
B. Orifices of the segmental organs in front of the setz of 
the dorsal row. 
(a) Copulatory apparatus altogether wanting ; external 
genital orifices blended with those of the segmental 
organs; sete allalike. Azteus, Perrier. 
(6) Male orifices distinct, situated in the ventral rows of 
sete ; setee of the clitellum modified for copulation 
and ornamented ; cephalic lobe prolonged into a 
tentacle. ARhinodrilus, Perrier. 
(c) Male and female orifices quite distinct ; the last blended 
with those of the spermathecz ; a muscular retractile 
penis, but enclosed in a special pouch. Exdrilis, 
Perrier. 
III.—POSTCLITELLIA. 
The male genital orifices situated behind the clitellum. 
A. Sete in pairs, in four rows. 
(a) Two pairs of male genital orifices, each armed with a 
penis composed of a certain number of curved sharp 
pointed setee. Acanthodrilus, Perrier. 
(6) A single pair of male genital orifices ; no copulatory 
apparatus. Dzgasier, Perrier. 
B. Setee isolated, forming circles in the middle of each seg- 
ment ; only one pair of male genital orifices. 
(a) Male orifices situated in the ventral region, but sepa- 
rated from each other and placed on the second seg- 
ment behind the clitellum, which consists of three 
segments ; orifices of the spermathecze wholly lateral. 
Pericheta, Schmarda.* 
(6) Male orifices contiguous, collected in a pit situated on 
the segment immediately following the clitellum, 
which is formed of more than three segments, orifices 
of the spermathece distinctly placed on the ventral 
surface, and almost joining ; cephalic lobe deeply en- 
croaching behind on the first segment. Perzonyx, 
Perrier. 
LV ACLITELLIia. 
Clitellum apparently absent. 
Sete in four rows, in pairs in each row. Orifices of the seg- 
mental organs in front of the sete of the upper rows.—Four male 
genital orifices, two in the lines of the ventral rows of seta, and 
two between the two rows on the same side. JMonzligaster, 
Perrier. 
Incerte sedis—Sete arranged in quincunx, at least in the 
posterior part of the body. Uvocheta, Perrier. 
NoteE.—In my paper on the New Zealand Earthworms in Trans, N.Z, Inst., ix., 
p. 350, I have, in the descriptions of the first three species, mistaken the openings 
of the male genital organs for the valves (or openings of the spermathecex, and vice 
versa, ‘The first of these species, Z. wliginosus, probably belongs to Acanthodrilus ; 
the two last, Z. campestris and L. levis, to Digaster.—F.W.H. 
* This is the same as Megasolex, 
