THE EARTHWORMS OF LAHORE. 505 



First five segments consist of single annuli while segments vi and vii of 

 two annuli each, and rest of the precliteller segments of three each; no 

 distinct secondary annulation behind the clitellum. 



Setfs are in a chain which is interrupted ventrally but there is no dorsal 

 break, usually zz^=i/z sometimes a little more than ?/~. 



Seta a is especially enlarged and the line of setfe aa in all the prechtel- 

 lar segments is nearly straight. 



The numbers of the setee are as follows :— -. - — j and 33 in the mid- 

 dle part of the body. 



First dorsal pore in the intersegmental furrow ^y- 



Clitellum extends over xiv— xvii ^-=4 segments). Setse are present on 

 the clitellar segments. t .„ 



The male apertures are situated on large rounded papiUse on segment 

 xviii, these in turn are overhung by large glandular areas which take up the 

 whole length of the segment and encroach a little on segment xix also. 

 The interval between the male pores is nearly \ u, there are no setjse between 

 the male pores (Fig. 6, Plate 1). 



_Fe??iffl/ej5ore could not be distinguished. 

 No sperma thecal apertures are visible and there are no other genital 



marks of any kind. „ _li xu- i 



Internal anatomy .—^e^ium # very thin and delicate, 4 rather thin and 

 the septa i— i| thick and muscular, i| and onwards thin but very definite. 



The Gizzard is in segment v. Michaslsen in his " Oligochceta " (1) in the 

 " Tierrich " says that it lies in segment vi, while in his " Indian ohc/ochcsta" 

 (2) he says it lies in v (vi?). The difference is probably due to the earlier 

 observers having not distinctly seen the thin and delicate septum |. 

 There are no calciferous glands nor any intestinal diverticula. 

 There are five pairs of hearts in segments ix— xiii. 



Excretory system.— Eo\h micro and meganephridia are to be seen m this 

 form. The micronephridia are seen as conspicuous masses lying on the sides 

 of the intestine from segments xv onwards, but they occur m the more 

 anterior segments also where they are nearer the midventral line and are 

 hidden by the cone within cone arrangement of the septa themselves. 



The meganephridia begin about segment xx and appear to be due to the 

 increased development of one of the tubule in the micronephnc mass ihey 

 are small at first but about the xxx segment where they reach their tuli 

 size they are as very conspicuous tubes one on each side of the intestine 

 lying between the micronephric mass. 



Reproductive organs are lodged in segments ix — xix. 



Male organs.— The testes and seminal funnels are free in segments x and xi. 

 The paired seminal vesicles lie in segments ix— xii. They are irregularly 

 cut up into small lobes. There are no median seminal vesicles, ine 

 prostates are rather thick of an opaque white color lying m segments xviu 

 and xix, the prostatic duct is thick and shows an S-shaped curve. 



The penial setm are shghtly curved at the end, the free end is siigiitly 

 bifid. Round the distal portion of the shaft there are a number ot 

 prominent spines arranged in rather irregular rows on the shaft, (i^ig. 



15, Plate T). .,..„+ 



Female organs.— T\^e ovarian funnels as well as ovaries he m segmeM 



xiii, the oviduct is xiv, hence the female opening externally would be on 



segment xiv. ... , +iiov 



The spermatheccB are three pairs lying in segments vu— ix, nence mey 



would open externally in the intersegmental furrow y— 3. ifie ampuiia 



is elongated with a constriction in the middle, it gradually narrows towards 



