284 



SUBANTARCnC ISLANDS OF NEW ZEALAND. 



[Oligoohaeta. 



The two spenmUhecal pores, at 7/8, 8/9, are in the same line as the male pores. 

 Tuhercida pubertatis are present as white paired glands on segments 10, 11, 16, 17, 

 and 19, in line ab, prechaetal and median of the genital 

 pores. In one specimen additional glands are on the 9th 

 and 12th. The nephridial pores are in line d. 



Internal Anatomy. 



The pharynx extends back into segment 6. There is 

 no gizzard ; not even the usual vestige could be detected in 

 sections. 



The oesophagus extends from the 7th to the 12th as a 

 straight tube of nearly uniform diameter ; it widens in 13 

 and 14, the walls becoming lamellate ; the gland is not 

 constricted by the septum. The tube now narrows in the 

 15th, widens again in the 16th, and enters the intestine in 

 the 17th, when the wall becomes thin and the lumen wide. 



The nephridia are relatively large, extending round the 

 wall from the 2nd to about the 9th chaeta, so that they 

 reach the dorsal surface. 



Testes and ovaries in the normal position, the latter 

 very large. Two pairs of sperm-sacs, in the 9th and 12th segments. 



The prostates are tubular, reaching from the 18th to the 20th 

 minute, and there are no penial chaetae. 



Two pairs of spemaihecae lie in 8 and 9 ; each has a subspherical ampulla, with 

 a short thick duct into which opens a single tubular diverticulum close to the base 

 of the ampulla ; it is about as long as the diameter of the latter (Plate XI, fig. 33). 



Locality. — Auckland Islands : (a.) Bush soil. North Arm of Carnley Harbour ; 

 (W. B. B.). (b.) At mouth of fresh-water creek, as it falls into a pool ; (Page), 

 (c.) 200 ft. above Watering Creek, Camp Cove, in somewhat swampy ground ; 

 (W. B. B.). (d.) Enderby Island ; in a log near a pool ; (W. B. B.). 



Remarks. — This species agrees in several features with D. aquatica, Benham,* 

 which I described from Lake Manapouri, but from it is readily distinguished by the 

 thick body-wall and abundant pigment, as well as by fewer chaetae per segment. 

 It is, however, clearly related to it in its general structure and habits. 



DiPOROCHAETA HKLOPUILA. 



Ventral view of the genital 

 segments. ( x 12.) 



The duct is 



Diporochaeta brachysoma, sp. nov. (Plate XI, figs. 34, 35.) 



Five specimens of this striking worm were obtained- striking from its stout 

 short form of body and from its very dark colour. The following note was made 

 of the living animal : " A very dark purplish-brown, nearly black, worm, with orange 

 clitellum and pale-brown under-surface. The general facies reminds me of Plagio- 

 chaeta sylvestris." In formol the colour is dark purplish -grey, paler below, with 

 a narrow dark band along the entire ventral surface, occupying the interchaetal 

 area, this being absent only on the clitellar segments. The clitellum is now brown, 



* Benham, Proc. Zool. Soc., ii, 1903, p. 226. 



