The oesophagus extends from vi to xvi, and has two pairs of calciferous glands, a pair in xiv and a pair in xv. The intestine commences in xvii, is very thin walled, and has a marked typhlosole.

Vascular System. The dorsal blood vessel is paired, except in the first five segments, and the two vessels remain separate as they pass through the septa. There are four pairs of dilated hearts, a pair each in x, xi, xii and xiii.

Reproductive System. Two pairs of lobate testes are present, a pair in × and a pair in xi, and there is a single pair of lobate ovaries in xiii. There are two pairs of spermathecae, a pair in viii and a pair in ix. Each spermatheca is in the form of a spheroidal sac opening by a narrow duct to the exterior. Surrounding the duct is a curved diverticulum, with its surface upraised into rounded pustules, which opens laterally into the duct of the spermatheca. (Plate 122, fig. 3.) There are two pairs of elongate, coiled, tubular prostates, a pair each in xvii and in xix. Each prostate is wholly confined to one segment. Large copulatory muscles are present in the region of the prostates (as in H. rossii Benham, 1902). There are two pairs of racemose vesiculae seminales, a pair in ix and a pair in xi.

Micronephridia commence in ii, and a pair of small ventro-lateral clusters of micronephridial tubules is present in each segment posterior to this.

Hoplochaetina polycystis n.sp. (Plate 123, figs. 1–3)

A single specimen of this very large pink earthworm was collected from a depth of about twelve inches in Awapuka clay loam, under dense native bush, near the summit of the Mangamuku Range to the south of Kaitaia. It is 219 mm. in length, has 168 segments, and is 8 mm. in diameter. The prostomium is epilobous. The chaetae are perichaetine in arrangement, closely spaced around the segments except for a ventro-medial gap, and number about 70 on each segment. The clitellum is darker in colour than the rest of the body and surrounds segments xiv to xix.

Spermathecal pores are not visible externally. There is a single pair of female pores on xiv. Each pore lies anterior to the chaeta third from the ventral mid-line on the corresponding side. There are two pairs of prostatic pores, a pair on xvii and a pair on xix, each pore opening on a dome-like papilla situated 3 mm. from the ventral midline. A longitudinal groove joins the two prostatic pores of each side and a male pore lies in each of these grooves on xviii.

There are no nephridiopores. Dorsal pores commence at 11/12 and are present in each intersegmental groove posterior to this.