1904.] EARTHWORMS FROM NEW ZEALAND. 235 



the apex of tlii.s " penial papilla," as it may be termed, are two 

 independent apertui-es, belonging to the two sacs of penial chaetfe. 

 At the base of this penial papilla, and on the outer side, there 

 opens the muscular duct of the prostate, while the vasa deferentia 

 (which have united) open into a posteriorly placed recess of the 

 above-named chamber. This chamber is very shallow, and w^e 

 practically have four pores on the porophore ; and probably in a 

 less contracted condition these four pores w'ould open into a 

 shallow pit, the margin of which has, in our specimen, closed 

 over the pit so as to leave only a single small aperture. 



The spermatheca (text-fig. 54) lies in segment 8, on each side ; 

 it is a large and long sac, broadest in the middle, without a 

 definite duct, but narrowing as it approaches the body- wall. The 

 diverticulum is narrow and tubular, more than half the length of 

 the sac and about one-fourth of its diameter ; it opens indepen- 

 dently of the sac itself. 



As a matter of detail, the length of the main sac is 8 mm., its 

 breadth is 2*5 mm. 



Log. Ruatahuua, Urewei-a Country, North Island of New 

 Zealand. 



Rhododrilus besti, sp. n. (Text-figs. 55-61.) 



A very pale, and probably white, worm, with yellow clitellum ; 

 its general appearance is that of an Octochcetus. A much smaller 

 worm than the preceding, and known to the Maoris as 

 " Tokerangi." 



Dimensions. Length 125 mm., diameter 5 mm. just behind 

 the clitellum ; wdth 206 segments, which, with the exception of the 

 first four, are triannulate. 



The chcetce are spaced, and as measured on the body, ab=cd; 

 bc=aa=l?; ab; dd=2^ 6c = about 4 ab. That is, the interchsetal 

 spaces on each side are equal and less than the lateral space ; 

 the ventral space is less than half the dorsal space. Relatively 

 aa is gi-eater than in the preceding species. 



Clitellum saddle-shaped ; on segments g 13 — 18 ( = 5J segments). 

 The glandular tissue extends downwards as far as line of 

 chseta a. 



Genital 2)ores, &c. — A pair of porophores in segment 17, in line 

 of a : on each, two pores are readily visible under a lens, and the 

 penial chfetfe project from the outer one. There are four pairs of 

 postgenifcil tubercula pubertatis, on the posterior annukis of 

 segments 19, 20, 21, 22, in line with the gap ab, the ventral 

 margin extending below a; so that they are separated by a 

 much greater space than in B. edulis. Each ttcbercuhon puber- 

 tatis is oval, and slightly depressed in its central part, so as 

 to appear sucker-like (text-fig. 56, p. 236). 



In addition to these four pairs, there is on the hinder margin 

 of segment 11a pair of rounder swellings — not pitted apparently — 

 in line with the porophores, and not extending so far outwards 



