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Show 1 9 0 4 .] EARTHWORMS FROM NEW ZEALAND. 249 Chcetce : when viewed from above, both c and d are on the dorsal surface, and c is well above the lateral margin. aa = fjc - cd ; ab<bc ; dd=2b>be. The clitellum is fully developed, complete, and includes segments 14 to 17; but both the 13th and 18th segments are glandular on the dorsal surface, the furrows 13/14 and 17/18 are, however, quite deep, whereas the intervening ones are obliterated. Genital pores, &c. (text-fig. 73).-In segment 18 is a slight circular depression with raised margin, in line with the gap ab ; the chaeta a appears to be absent. There is a single median, oval tuberculum pubertatis on the hinder margin of the 18tli segment, extending from a-a. The three pairs of spermathecal pores are on the hinder margins of segments 6, 7, 8, in the gap ab, though nearer to a than to b. Text-fig. 74. Tokea huttoni.- View of the prostates, which, though symmetrical, have assumed a reversed position (? abnormal), with the anterior end directed forwards. N.C., nerve-cord. Text-fig. 75. Tokea lmttoni.- Spermatheca (X 12. Camera outline of mounted specimen). The gizzard is long, narrow, and the wall rather thin. The micronephridia form a pretty close felt over the body-wall, and commence (as in other species) in segment 3. The prostates (text-fig. 74) are shorter than in either of the preceding species, and both are directed forwards, but lie side by Internal Anatomy. There are seven thickish septa behind segments 7-13. The last heart is in segment 12. Text-fig. 74. 19 - -N.C |