300 MR. F. E. BEDDARD ON NEW OR [May 18, 
The individual in question agreed in every other respect with 
P. indica, and the difference in the number of segments constituting 
the clitellum appears to me rather as an indication that this structure 
is subject to some variation in the same species than a mark of 
specific distinctness. With regard to the dorsal pores, they are 
present in my specimens in all the segments following the clitellum, 
as stated by Horst; I find, however, that the posterior border of 
the clitellum is not only marked by a dorsal pore, but the anterior 
border also, and that there is yet another pore in front of this ; this 
latter appears to be the first. 
In all other respects my specimens agreed with Horst’s description 
of Perichaeta indica, and I believe them to be identical. . I need not 
describe the organs of the body severally, as I was unable to detect any 
points of difference. 
2. PeRICH£ZTA HORSTI, N. sp. 
In a collection of Earthworms sent to me from Manila by my 
friend Mr. H. E. Barwell were a considerable number of specimens 
of a Pericheta which I regard as of a new species. I dedicate it to 
Dr. Horst, whose work in this department of Zoology is well known. 
It is a small species, the largest individuals measuring only about 2 
inches in length. 
The external characters afforded by the genital papillz serve to 
distinguish the species; although the value of these characters is 
well known, it is often impossible to make use of them, as the genital 
papillee are not always present to the full number even in worms 
which are in other respects sexually mature. Out of seven or eight 
individuals which I have examined and dissected, one or two had very 
many more genital papillee than the rest ; in the absence of evidence 
to the contrary, I regard these specimens as being in this respect fully 
adult. The genital papilla are placed in the neighbourhood of the 
male generative pores as in P. affinis; but instead of there being 
only a single pair to each segment, there are three distinct papille 
placed at equal distances from each other and within the circle of 
setee. These are present on the two segments which precede the 
eighteenth and on the four segments which follow it; on the 
eighteenth segment there is naturally only the median papilla 
present, the genital orifices themselves occupying the position of the 
outer papille. 
In Pericheta biserialis and in P. juliani, according to Perrier’, 
there is some resemblance in the disposition of the genital papillae 
to the condition which is characteristic of the present species; in 
both of the former there are a pair of genital papillee corresponding 
in position to the male reproductive pores and occupying a variable 
number of segments following the 18th. I have myself had the 
opportunity of examining a number of specimens of a Pericheta 
from the Philippine Islands, which I refer to the former species from 
the fact that the ventral setze are separated by a considerable interval 
and are of considerably greater size than the remainder, and that 
1 Perrier, Comptes Rendus, loc. cit. 
