OLIGOCHATA. 267 



Male Organs. — Testes wore not distinguished. Tlic male funnels 

 are free in segments X. and XI. Vesiculae seminales are situated 

 in XI, and XII., paired, of large size, much lobulated, the lobules 

 forming grape-Hke masses. The 'prostates are of moderate size, 

 occupying segments XVIII., XIX., and XX. ; they are also much 

 lobulated ; the duct is straight and stout, arising from the gland in 

 XVIll. 



The ovaries, in segment XIII., are comparatively large, and fan- 

 shaped, folded longitudinally. The female funnels are small. 



The spermathecse are two pairs, opening in furrows 7/8 and 8/9 ; 

 the ampulla of each is circular, flattened between the gizzard and 

 the body-wall ; the duct is short and fairly thick ; a small diverti- 

 culum, of an elongated ovoid shape, and one -quarter as long as the 

 ampulla, arises from the duct. 



On opening the ampulla, the upper end of the duet is seen to be 

 invaginated into the cavitj^ of the ampulla. 



The genital setae (fig. 9) are •72--75 mm. long, and 14-16 [x thick. 

 They are almost straight, except at the distal end, which is curved 

 to form the quadrant of a ckcle. The distal end (except the extreme 

 point) is ornamented with finely sculptured dots, which are arranged 

 in four circles one above the other. 



Megascolex curtus, sp. nov 

 (Plate II., Fig. 10.) 



A single specimen, incomplete at its posterior end. From the 

 same locality as the preceding. 



External Characters. — Length of the fragment I 1/2 inch ; 

 breadth 3 mm. ; colour light gray ; segments present 90. 



Prostomium epilobous 1/3. 



First dorsal pore in mtersegmental furrow 13/14. 



The clitellum embraces segments XIV.-XVII., = 4 ; it extends 

 all round the circumference, but is less well marked ventrally in 

 XVII. Setse are present on the clitellar segments. 



The male apertures are on small papillae on segment XVIII., in the 

 line of setae h, \fl of the circumference apart. The surrounding 

 and intervening parts of the body -wall are thickened, wrinkled, with 

 hregular depressions just anterior and internal to the male apertures, 

 and an elevation in the mid- ventral line. 



The female aperture was not distinguishable. 



The spermathecal apertures are one pair, in furrow 8/9, apparently 

 between the lines of setse b and c ; but these apertures were very 

 inconspicuous. 



Genital papillae are present as two median ventral large flat oval 

 elevations. Of these, one is situated on segment XX., occupying 

 the whole length of the segment and encroaching forwards on XIX. 

 as far as the middle of this segment ; transversely it extends from 

 the line of setae a on one side to the same line on the other side 



2n 6(7)12 



