OLTGOCH^TA. 265 



Megascolex pattipolensis, sp. nov. 



(Plate II., Fig. 8.) 



A single specimen. From the same locality as the last. 



External Characters. — Length 2 inches ; breadth 2 1/2 mm. ; 

 segments 129. 



Prostomium prolobous, with in addition a pair of small grooves, 

 leading backwards from the hinder hmit of the prostomium through 

 1/3 of segment (combination of pro- and epilobous characters). 



First dorsal pore in intersegmental furrow 5/6. 



Clitellum absent (or not yet developed). 



Male apert^ires on papillse, in segment XVIII., in line of setae &; 

 mterval bet^^ een male apertures = 1/3 circumference ; the papillse 

 of the two sides connected by a narrow transverse ridge (fig. 8). 

 Female aperture not observed. 



Spermathecal apertures not very conspicuous, in furrow 8/9, in 

 line of setse h. 



Genital papillse (fig. 8) on segment XIX., transversely oval, their 

 centre in fine of setse 6 ; while abutting on furrow 18/19 they do 

 not occupy the whole length of the segment antero-posteriorly ; in a 

 transverse direction they extend from about the line of setse a to an 

 equal distance on the other side of b. Another pair of small, trans- 

 versely elongated papillse is situated in furrow 17/18, in front of 

 and bordering on the anterior edge of the papilla of the male aperture 

 on each side. 



The setse are sometimes difficult to see. Ventrally the setal ring 

 is broken in each segment ; aa = 2 ab (segment XVII.) or 2 1/2 ab 

 (XX. and further back) ; ab := be, be is shghtly greater than cd ; 

 cd = de approximately ; but though a and b are in regular longitu- 

 dinal lines throughout the body, c, d, and e are placed somewhat 

 irregularly posteriorly. 



Dorsally to e are a few {e.g., in the middle of the body, 4) more 

 setse, irregularly placed. Anteriorly zz = about 3 yz on the average ; 

 in segment XIII. zzz=2 yz.,Sit the junction of middle and posterior 

 thirds of the body = 1 1/2 yz., and at the posterior end 22 = yz. 

 Thus the fine z is irregular. 



Number of setse : 20/XIII. ; in middle of body 20 ; at junction 

 of middle and posterior thirds 24 (12 on each side) or 25 (12 and 13 

 on each side respectively). 



Internal Anatomy. — Septum Qp is (?) shghtly thickened* 

 septa 7/8 and 8/9 are moderately, 9/10 and 10/11 considerably 

 strengthened. 



There is a large gizzard in segment VI. Calciferous glands are 

 present in XV. and XVI., appearing as lateral swellings on the 

 oesophagus, which narrows again in XVII., and dilates to form the 

 intestine in XVIII. There are no intestinal diverticula (at least as 

 far back as XL.) A typhlosole is present. 



The last heart is in segment XIII. 



