674 MR. F. E. BEDDARD ON NEW [DcC. 20, 



doubt, to extrude the papillse already spoken of, on to which the 

 atrial pores open. There are no penial setae. 



This species is clearly most intimately related to OetochcBtus 

 multiporus ; indeed it is not a little difficult to separate the two ; 

 the difficulty, too, is increased by the variability of the larger species. 

 This difference of size is the most obvious difference ; and it is, I 

 think, a difference that must be allowed. The variability of OciO' 

 chcetus multiporus unfortunately concerns those very organs upon 

 which I had at first attempted to lay stress as distinguishing the two. 

 In some individuals of OctochcBtus multiporus the gizzard is limited 

 to the sixth segment, the second septum lying just in front of it, 

 attached therefore to the oesophagus ; but in other specimens this 

 septum is inserted on to the gizzard itself, which thus occupies two 

 segments, as in Octochcetus tJiomasi. In two individuals the single 

 pair of calciferous glands are in segment xviii. ; but in others, as 

 is the case with Octochestus thomasi, in the xviith. Another 

 possible distinction between the small and the large species concerns 

 the dorsal vessel ; in O. thomasi, as already mentioned, this vessel 

 is single until the seventh segment. In a specimen of Octochcetus 

 multiporus the dorsal vessel was single until the commencement of 

 the sixth segment only ; in this segment it became double ; in 

 another the single dorsal vessel became double at the septum 

 separating v./vi., but immediately after the two halves became fused, 

 to again divide at about the middle of the segment. The shape of 

 the gizzard and its relative length in the two species does appear 

 to differ ; in the smaller species it is proportionately longer and 

 narrower than in the large species. 



The next new species cannot by any possibility be confounded 

 with the foregoing; I name it after Capt. Hutton, who has done 

 so much in describing the fauna of New Zealand. 



2. Octochaetus huttoni, n. sp. 



I had a number of examples of this species sent to me by 

 Mr. W. W. Smith; they were all of approximately the same size; 

 an individual selected for accurate measurement was 130 mm. in 

 length by 7 mm. in breadth at the clitellum. It consisted of 233 

 segments. 



The colour during life was pink, the clitellum being white ; this 

 colour is due to the fact that the species, like 0. multiporus, had 

 no pigment in the skin. 



The anterior segments are much annulated. After the clitellum 

 there is also, though to a less extent, an annulation of the segments. 



The clitellum occupies segments xiii.-xix. (xx.). 



The atrial pores are borne upon a very prominent fold over- 

 hanging on each side the ventral surface, which in this region 

 appears in consequence as if hollowed out. The two pores of each 

 side are connected by a longitudinal furrow. 



The prostomium is short and wide, and is not continued by grooves 

 on to the buccal segment, which is marked by numerous furrows. 



The setse are in pairs not closely approximated. 



