Earthworms and Their AlliesBeddard, Frank E. (Frank Evers)
Science
Earthworms and Their Allies
Beddard, Frank E. (Frank Evers)
Earthworms
We have also in this Indian region the equally ubiquitous _Eudrilus
eugeniae_ which need not of course detain us further. The Lumbricidae
are for the most part of European forms with the exception of
_Helodrilus indicus_ conceivably an actual inhabitant of India.
It is among the Megascolecidae that the vast majority of the
forms endemic in India are to be found. We shall take this family
according to its sub-families. In the first place we note that the
sub-family Acanthodrilinae is totally unrepresented. The large
sub-family Megascolecinae has very numerous representatives. Of
the genus _Megascolex_ itself there are some 30 species, of which,
however, two or three are looked upon as varieties. Of the allied
genus _Notoscolex_ there are ten species and of _Perionyx_ about
13. The genera _Megascolides_, _Diporochaeta_, _Spenceriella_ and
_Woodwardia_ have only six species between them of which three belong
to _Megascolides_. _Plutellus_ has five species in this region.
_Lampito_, which is a widely spread form with but one species _L.
mauritii_, may or may not find here its original home. It also occurs
in Africa and Madagascar. _Pheretima_ is represented by no less
than 12 species, of which at any rate the very great majority are
peregrine forms, and not to be safely regarded as forming an integral
part of the fauna of the Indian peninsula and adjoining countries.
Of the sub-family Octochaetinae the type genus _Octochaetus_ has
ten species in this region and _Eutyphoeus_, which is restricted to
the region, has 15 species or perhaps rather more. _Hoplochaetella_
has but one. Of the Trigastrinae there are four or five examples
of the genus _Dichogaster_ which occur within the region now
under consideration; but it is doubtful whether they are truly
indigenous. On the other hand _Eudichogaster_, closely allied both to
_Dichogaster_ and _Trigaster_, seems to be confined to this part of
the world where it is represented by five species. Finally we come to
the last sub-family--that of the Ocnerodrilinae, which is represented
by a species apiece of the genera _Ocnerodrilus_, _Nematogenia_ and
_Gordiodrilus_. The latter species _G. travancorensis_ is alone
to be regarded as endemic and it is very near to the African _G.
zanzibaricus_, described some years since by the present author.
The remaining family of terricolous Oligochaeta found in India is
the family Moniligastridae which is practically limited to this part
of the world and consists of at least twenty species distributed
among the genera _Moniligaster_, _Eupolygaster_, _Desmogaster_ and
_Drawida_, the majority belonging to the last-named genus.
This quarter of the globe is therefore inhabited by 18 genera which
are certainly truly endemic, and which comprise between them about
120 species. But only four or five genera are peculiar.
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