Olir/ocJiaeta.'] SUBANTARCTIO ISLANDS OF NEW ZEALAND. 291 



EXPLANATION OF PLATES X AND XL 

 Platk X. 

 Phrcdilrihia camphcllUuins. 

 Fill'. ]. Loii'^itudinal scctioii tliioiiuli flii' spoi-iti- ami spiTmathecal pores, combined from two conse- 

 cufivc si'ctidiis. (Ciiucni outline, x 100: details somewhat diagrammatically sketched 

 in.) a, spermiducal pore in xii : b, penis in its sac ; fl, prostate, in transverse section ; 

 d, neck of prostate entering penis ; e, sperma thecal pore in xiii ; /, spermathecal antrum, 

 surrounded li"\- mnsclos : ij. narrow duct of spermatheea. 



fUnznihihis iiiicl'liiiiihriis. 



Fig. 2. Transverse section through the paired male pores. (Camera, x 60 ; details of body-wall diagram- 

 matically sketched.) a, male pore; b, penis-sac, with sperm-duct above; c, nerve-cord; 

 (1, intestine, to the left of which are the dorsal and ventral blood-vessels : r, sperm-sac. 



Fig. 3. Spermatheea, from a transparent specimen, a, ampulla; h. glcJiuhir, glandular sac; c. epi- 

 dermal pit; d, spermatozoa projecting from the pore. 



Fig. 4. Base of the penis, in transverse section (c/. d in fig. 7). ( x 370.) 



Fig. 5. Sperm-duct, in transverse section, with prostate glands surrounding it. Tin' groups of glands 

 are confined to the dorsal and lateral surfaces, each group l)eing enveloped in a slieath 

 (if cuelomic epithelium. (Camera, x 370.) 



Fig. 0. The lower part of the penis, in transverse section (at about the level of c in tig. 7) : the wall is 

 a good deal folded, d, lumen. (Camera, x 370.) 



Fig. 7. Longitudinal section through the male apparatus. (Camera, x 250.) The region from the 

 funnel to the upward curve of the duct lies in one section, the posterior part was contained 

 in several consecutive sections, a, male pore ; b, muscular penis-sac : c, penis, folded 

 protrusible portion ; d, glandular bulb ; e. sperm-duct ; /, prostate glands enveloping 

 the duct for the greater part of its length : ij. retraitor muscles of penis : '/', retractors 

 of the sac ; s, /, septa 10/11 and 11/12.' 



TjumhririUiis liitfiincdiiis. 

 Fig. 8. Spermatheea, from a bisected specimen. (Camei-a x 60.) r^. pore, surrounded Ijy a rosette of 

 glands ; b, aperture into oesophagus. The thicker portion of th(> wall is the muscular duct. 

 Fig. !). Subneural gland. (Camera, x 185.) 



Fig. 10. Sperm-funnel, from a longitudinal section, which cuts it lengthwise. (Camera, x 100.) 

 Fig. 11. Nephridium. combined from two consecutive sections. (Camera, x 370.) 



Piiddrihoi luberciihitus. 



Fig. 12. Transverse section of the liody. at the level of the copulatory gland, showing the circum- 

 ferential extent of the clitellum and the position of the gland through which the sperm- 

 ducts open (c/. fig. 14). <i. copulatory gland ; 6, clitellum ; c, large ovum. (Camera 

 outline, x 35.) The chaetae are inserted on one side only, and the body-wall is repi'esented 

 diagramniaticallv. 



Fig. 13. Portion of the body-wall, enlarged. (Camera, x 370.) The cuticle [a] is remarkably thick ; 

 b, goblet cells ; c, circular muscles ; d, longitudinal muscles. 



Fig. 14. Longitudinal section through the genital segments, which are numbered above in roman 

 numerals. (Camera, x 100.) o\ a", the male pores ; b, female pore ; c, c-, the sperm- 

 ducts ; d, oviduct ; e, the copulatory (? prostate) gland. 



Plate XI. 

 Pclodrihix aucl-hiiidicu.s. 

 Fig. 15. Longitudinal section through the genital segments, whi<Ii ar(> marked in roman numerals 

 l>elow. (Camera, x 60.) The two limbs of the sperm-duct lie almost wholly in two con- 

 secutive sections. «', rr. the male pores ; b\ 6'\ the female pores ; c, testis ; d, sperm- 

 funnel ; e, sperm-duct ; /, copulatory (? prostate) gland ; f/, oviduct ; h, ovary (the other 

 ovary is omitted for sake of clearness) ; /, base of chaetae (the entire chaeta is represented 

 in segment x). 



