beads along the lamina. There is a single pair of spermathecae in ix. Each consists of a large ovoidal sac opening by a wide duct to the exterior. A thick digitate diverticulum opens into the spermathecal duct just below the spermathecal sac. (Plate 105, fig. 3.) The prostates are convoluted tubular organs arising from a thick muscular duct in xvii and following an irregular course to their termination in xxi. A sac containing penial chaetae lies against the medial aspect of each prostatic duct and is attached by strong muscle fibres passing through septum xvii/xviii to their insertion on the dorso-lateral aspect of the peritoneum close to the posterior septum of xviii. The penial chaetae have slender gently curved shafts and a slightly recurved blunt tip. Distally, for about a third of their length, they are armed with rows of minute spines which point towards the tip of the chaeta (Plate 105, fig. 4.) There are two pairs of botryoidal vesiculae seminales, a pair in xi and a pair in xii, surrounding the oesophagus in those segments. Meganephridia are present in every segment except the first. The tubules are very slender and at first sight it appears that there are both meganephridia and micronephridia present in each segment. However, close examination shows that the meganephridium consists of three distinct parts: (i) A slender tubule arises from the small nephridial funnel and passes down the lateral margin of the coelom to (ii) a complex coiled tubular portion of the nephridium close to the ventral nerve cord. Here the tubule is thrown into a series of tightly wound spirals which project into the coelom and superficially closely resemble micronephridia. (iii) The tubule passes from the coiled portion straight back up the lateral aspect of the peritoneum to open to the exterior through a very small vesicle which is little more than a slight bulb in the end of the tubule. Remarks. The species is most closely similar to R. edulis, but the spermathecae of R. edulis are in viii, while those of R. intermedius are in ix. Rhododrilus disparatus (Plate 106, figs. 1–3) Several specimens of this large sienna-brown earthworm were collected from unmelanised sands in a recent flood deposit beside a small stream three miles south of Tolaga Bay and others from a silt loam under native rain-forest (ngaio, titoki) ten miles east of Otoko on the Gisborne-Opotiki road. A mature specimen measures 197 mm, in length and 6 mm. in diameter and has 203 segments. It is sienna-brown dorsally, paler ventrally, and has a greyish-brown clitellum, covering xiv–xviii and part of xiii down to the level of chaeta a (5 ½ segments). The prostomium is epilobous. There are eight chaetae per segment, arranged in pairs. On xxiv: ab = cd = lmm.; aa = 2 mm.; bc = 2·5 mm.; dd = 4 mm. There is a single pair of small spermathecal pores at 8/9 in line with chaeta b. A pair of female pores occurs on xiv, slightly anterior to chaeta a. The single pair of prostatic pores are situated on the apices of a pair of prominent dome-like papillae, in line with the chaetae ab