56 Mr. C. R. Narayan Rao on some 
is fairly constant, the first occurring on the somite 14, 
though there may be lop-sided individual variations. Behind 
the clitellar wing segments 33-35 bear lateral tubercles, 
and median ones occur on segments 88-40. The disposition 
of the lateral papilli is interesting: the first three on either 
Fig. 3, 
A. Transverse section of the middle of body of G. Sluviatilis, to show the 
relation of the ccelomic muscles and the viscera. In the ventral 
ccelomic chamber lie the nephridia, nerve-cord, and the subintes- 
tinal and subneural vessels, 
B. Stained preparation of the ccelomic muscles, showing the clumps of 
cells and corpuscles of the coelomic fluid. The double and tri- 
nuclear nature of the cells is clearly seen. 
side are in seta-line Jc, 4 and 5 are shifted dorsalwards 
lying in seta-line cd, and the series from the sixth is again 
shifted to seta-line cd. Each tuberele is placed on the 
posterior margin of the somite to which it belongs, and may 
be so arge that the tubercles form a continuous row. Each 
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