| OCR Text |
Show 1887.] NEW GENUS OF LUMBRICID.*., 157 clitellar segments are thus modified. This latter statement I am able to confirm from the study of an Australian species of the genus, possibly identical with Horst's species. But the modification of the setae in the clitellar region of Thamnodrilus is more complete than Fig. 2. Fig. 3. Fig. 2. Thamnodrilus gulielmi. Anterior segments seen laterally; apertures of the nephridia in front of the dorsal pair of setaa ; segments of clitellum shaded vertically. Magnified twice natural size. Fig. 3. Seta from one of the segments of the clitellum; highly magnified. in Urochata, inasmuch as it has affected the dorsal as well as the ventral pairs. The clitellar setas are larger than the ordinary setae, as well as differing in their ornamentation ; this difference was very noticeable in an immature example, where the difference of age alone |
