258 DISCOVERY REPORTS 



Enchytraeus australis, sp.n. (Figs. 9-1 1). 



St. 122. 14. xii. 26. Maiviken, West Cumberland Bay, South Georgia. Under stones near upper 

 lake. Several specimens; along with E. albidus. 



St. WS123. 8. vi. 27. Gough Island. Shore coll.; under bark of a rotten tree. Fourteen speci- 

 mens. 



Length 6-7 mm. ; diameter 0-3 mm. Segments 37-42. 



Prostomium blunt, rounded. Head-pore between prostomium and segment i. 

 Setae enchytraeine in shape, the points fairly sharp ; the setae are large and strong 

 near the hinder end (length near the hinder end 76iu, in the anterior segments 64fx). 

 The number per bundle is very fairly constant — three throughout the body, in both 

 ventral and lateral bundles ; two in the lateral bundles in segment xii and occasionally at 

 the hinder end. 



The clitellum, embracing segments xii-xiii, is not conspicuous, and is absent ventrally. 

 The gland cells of the cUtellum are arranged in regular transverse rows. 

 There are in general no deeply staining gland cells in the epidermis. 

 The coelomic corpuscles vary in their numbers; they are oval, pear-shaped, or 

 spindle-shaped, 25 /m in maximum length, rather darkly staining, with nuclei. 



Salivary glands are present, arising from the recess behind the dorsal plate of the 

 pharynx; they are twisted tubes, narrow but of varying diameter, and form a coiled mass 

 which extends back into segment iv ; I saw no branching. 



There is no sudden widening of the oesophagus to form the intestine. In general, 

 there is nothing remarkable about the chloragogen cells ; they contain numbers of minute 

 refractile particles, possibly oil-like globules (though any oily matter would have been 

 dissolved out by the xylol in the preparation of the sections), appearing as scarcely more 

 than dots even with the high power, in diameter about i ^. Sometimes, however, in some 

 parts of the body, the chloragogen cells are hollow, and appear as a small layer of 

 protoplasm surrounding a central cavity — perhaps a space from which a fatty inclusion 

 has been dissolved out. 



The dorsal vessel begins in segment xiii. 



The anteseptal portion of the nephridium is small, about twice as long as it is broad, 

 and consists of the funnel only. The duct is about as long as the postseptal, and is given 

 off often from the hinder end but sometimes from a place somewhat in front of this, 

 running (observed chiefly in the posterior part of the body) downwards or downwards 

 and forwards to the surface. 



The cerebral ganglion is longer than broad (about i\-i\ times as long) ; its appearance, 

 in two specimens, is shown in Fig. 9. The sides converge slightly forwards or are almost 

 parallel ; the hinder border is not sharply notched, but gently hollowed. 



The testes are massive organs, each of which extends into the two segments x and xi, 

 with one large lobe in each segment, the lobes being widely continuous ventrally 

 between the segments ; or the organ may be a single mass with hardly any distinction of 

 lobes. Each testis is contained within a thin membrane, the testis sac, which encloses 

 also male cells in all stages of development up to the ripe spermatozoa. 



