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Show present on the hinder margin of segments 16 and 17, jmediad of the line a. The two oviducal pores are close to the median line, near the {interior margin of the 14th segment. Text-fig. (52. 1904.] EARTHWORMS PROM NEW ZEALAND. 241 1 3 14 15 16 1 7 18 19 20 A B Text-fig. 62. Tolcea esaulenta.- Ventral view of clitellar region, &c. (X 4 ) , showing male pores and arrangement of tubercula pubertatis and disposition of chaetse. This and the views in text-figs. 68,70, 73, 76, 78, and 80 are somewhat diagrammatic in that they are represented as flat projections, but the relative spacing of the cliaetffi, &c., is correct. Text-fig. 63. Tolcea esculenta.- Enlarged view of the male pore, the actual aperture is situated on a small papilla (C) which projects from the bottom of a pit (B), the skin round which is paler (A) than the surroundings. The chaeta b is shown on the left side. There are three pairs of spermathecal pores on the hinder region of segments 6, 7, and 8 ; these are not intersegmental, but are situated about midway between chaeta a and the margin, in each case. I could not detect dorsal pores. Internal A natomy. There are 8 stout septa, behind segments 7 to 14 ; but, in comparison with the thickness of the body-wall, their thickness is not so great as one would expect. The dorsal vessel is single; the last of the four pairs of hearty is in segment 13. In the heart-segments there is a supra-enteric vessel, with which the hearts are in part connected. The worm is micronephric *, and these organs commence in segment 3. In the last 20 segments of the body there is, in addition to micronephridia, a pair of compact, groups of tubules * I think this term, which was first employed by Vejdovsky, is preferable to my term " plectonephric," for it is by no means certain that a " network" of tubules always (if ever) exists. P r o c . Z o o l . Soc.- 1904, V o l . II. No. XVI. 16 |