igoS.] W. MiCHAEivSKN : Oligochceta of the Indian Empire and Ceylon. 159 



Hab, — South India, Tiger Shola (near Kodaikanal) in the Palni 

 Hills, 5,500' ; Dr. J. R. HENDERSON leg., vi-07. 



GEN. MEGASCOLIDES. 



MEGASCOUDES BERGTHEIU, MICHI.SN. ' i 



(Plate xiii, fig. 3.) 



M. b., MICHAELSEN, in Mt. Mus. Hamburg, xxiv, p. 150, f. 4. 



Present five mature specimens, of which two are incomplete. 



External Characters. — Dimensions: Length 100 — 120 mm., greatest thick- 

 ness 4^ — 5 mm., number of segments 146 — 175. 



Colour light grey ; without pigmentation. 



Head tanylobous. Prostomium small, its dorsal hinder appendix only a little 

 narrower than the prostomium itself, with parallel lateral borders, often divided by 

 a transverse furrow. 



Segments i — 3 are simple, segments 4 — 6 are divided into two ringlets, 7 into 

 four, 8 and 9 into five, 10 — 12 into three, as well as also the postclitellar segments, 

 the latter somewhat less distinctly. 



Setœ rather small, the ventral paired, the lateral remote from one another ; the 

 distance between those of the ventral pair only about a fifth part of the median ventral 

 distance {aa =^ab), the latter a little larger than the median lateral distances {bc = ^ aa) 

 and these a little smaller than the distance between the lateral setse {bc=^^cd) {aa : 

 ah : be : cd = TO : 2 : 8 : 9). The median dorsal distance is somewhat less than half 

 the circumference {dd =cdi. fw). 



Dorsal pores distinctly visible on the clitellum and behind it, the first in the 

 intersegmental furrow 12-13. 



Clitellum ring-shaped, occupying segments 13 — 17 (=5), but on the 13th seg- 

 ment somewhat lower than on the others. 



Male pores on segment t8 in about the lines of the setae b if not between a and 

 Ö, each on a penis-like short tip which rises out of a transversely oval, nearly circular 

 opening just in the centre of a big, knob-like papilla. These papillse are transversely 

 oval and occupy the whole length of segment 18 ; they nearly meet in the ventral 

 median line, where they are connected with each other by a transverse lower and 

 narrower bridge. 



Female pores transverse slits in the 14th segment, anterior to and medial from 

 the setae a, on a more or less distinct transverse furrow. 



Sperma the cal pores one pair on the intersegmental furrow 7-8, between the 

 lines of setae a and b, each on a small, but mostly distinct, transversely oval, eye-shaped 

 papilla, which extends between the lines of setae a and h. 



Copulatory organs very distinct and prominent and apparently constant 

 on segments 12, 13 and 20, in one specimen an additional organ on segment 21, 

 in two other specimens an additional one on segment 11. The copulatory 



