OLIGOCH.ETA. 263 



intestine begins in XV., and there are no diverticula (as far back as 

 segment XXXIV. at least). 



The last heart is in segment XIII. 



There is one pair of meganephridia per segment behind the male 

 apertures, as well as microne'phridia. 



Male Organs. — The testes and seminal funnels , the latter white and 

 glancing, are free in segments X, and XI. The vesiculx seminales 

 are paned, and much cut up into small lobules, in segments IX. and 

 XII. The prostates are comparatively small, the prostatic duct 

 thick and S-shaped. Separate from the prostate, and close to the 

 terminal portion of its duct, is a small gland attached by a short 

 stalk to the inner surface of the body- wall ; it is of the same opaque 

 whiteness and the same texture as the prostate ; on the one side this 

 accessory gland was situated some little distance anterior, on the 

 other side posterior, to the end of the prostatic duct. The penial 

 setae are "83 mm. in length, 22-27 \^ in breadth, curved, and then 

 very shghtly recurved again, distally ; the free end appears bifid, 

 the two limbs resembling the limbs of a horseshoe ; above the free 

 end are a number of prominent spines, arranged in irregular circles 

 round the distal portion of the shaft, with which thej'' make an 

 acute angle. 



Female Organs. — The ovaries and ovarian funnels are in XIII. The 

 spermathecse open in the furrows 6/7, 7/8, and 8/9 ; there are 

 thus three pairs. The ampuUa of each is bent on itseH ; when 

 straightened it is fusiform, narrowing distally to the external 

 aperture, without separate duct. From its base arise one or two 

 minute club-shaped diverticula, from 1/8 to 1/4 as long as the 

 ampulla ; on the left side, only the posterior of the three spermathecse 

 had two diverticula ; on the right side, the two hinder spermathecse 

 had two diverticula, the anterior only one. 



Remarks. — The featm^es wherein the present form appears to 

 differ from the typical form, as described, for example, in Michael- 

 sen's " Ohgochaeta " in the Tierreich, are the following : — The 

 head is prolobous ; the chain of setae is very distinctly interrupted, 

 both dorsaily and ventraUy {aa = 3 1/2 ah) ; no setse are noticeably 

 enlarged; the setal intervals ah, he, cd, &c., do not undergo a 

 regular diminution dorsalwards ; the first dorsal pore is in 12/13. 

 Less important, perhaps, are the small size of the prostates, the 

 smaller penial setae, the variability of the spermathecal diverticula; 

 the large round papillae, on which, in the typical form, the male 

 pores are situated, are here represented by sucker-Hke areas with a 

 prominent circular rim. 



Megascolex annandalei, sp. nov. 



One sexually mature specimen. 



Pattipola, Ceylon, hill country, 6,000 feet. In rotten wood of 

 dead tree stumps and logs in jungle. 



