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Show 1903.] NEW SPECIES OF EARTHWORMS. 211 The setae are strictly paired and the ventral pair of segment xvii. appear to be missing. The clitellum occupies segments xiv.-xvii. The median orifices of the spermatheca and of the spermiducal glands are very obvious, and frequently lie upon projecting papillae. The spermathecal pore opens far back upon the xiiith segment. The male pore opens far back upon the xviith segment, or even intersegmentally (xvii./xviii.). The penial setae can often be seen to protrude from it. Among the external characters, however, there is one which distinguishes the present species from its allies, and that is the total absence of the penial process of the body-wall. There was not the least trace of this organ observable in any of the individuals. It is true that this penis is not always to be seen in Stuhhnannia vciriabilis; but I do not think that it would be likely to be absent from thirty individuals selected at random ; and this absence is therefore one of the reasons which lead me to create a new species. Text-fig. 35. Dissection of Stuhhnannia michaelseni. xi xii, segments eleven and twelve ; L.V., intestino-tegumentary trunks; o.cl., oviducal apparatus; Sp., spermathecal sac; Sp.gl., spermiducal glands. The accompanying drawing (text-fig. 35) illustrates a general |