34 Proceedings of the Royal Society of Victoria, 



these genera the Tasmanian forms are likewise provisionally 

 referred, though, as previously stated, it will he necessary to 

 revise the classification when the collections of Mr. Fletcher and 

 myself are sufficiently complete and described. 



Up to the present time only a single earthworm is described 

 from Tasmania, viz., M. tasniatiianus. Fl. 



The collection here described consists of 10 species of Crypto- 

 <lrilus, 2 species of Megascolides, 6 species of Perichseta, all new 

 to science, so that together with Mr. Fletcher's M. tasiiianianiis 

 we now know of the existence of 19 species of earthworms in 

 Tasmania. There must be very many yet undiscovered, especially 

 in the well-watered valleys on the west coast of the island, but 

 so far as yet known the earthworm fauna is not so extensive as 

 that of Victoria or New South Wales. 



The following account does not include the description of 

 species whicli have clearly been introduced from foreign countries. 



(a) Cryptodrilus, Fletcher. 



(1). C. irregularis, sp. n. (Figs. 1, 2, 3). Spirit specimen, 6 

 inches long, more than ^ inch broad. 



Prostomium about half dovetailed into the peristomium. 



Clitellum not at all prominent, indicated by darker colour in 

 spirit specimen, and including segments 14-17 and the posterior 

 part of segment 13. 



Setse regularly arranged only so far back as the fourteenth 

 segment, after which they become very irregular and give a 

 decidedly perichfete appearance to the body, though more than 

 four do not appear to be present on each side. 



Male pores difficult to determine. There is a ventral median 

 patch on segment 18 of a white tumid nature, and on this the 

 two openings lie either very close together or fused so as to form 

 a single one. 



Oviduct pores on segment 14. Ventral of and anterior to the 

 innermost seta of each side. 



Spermathecal pores, two in number, at the level of the inner- 

 most seta of each side. One between segments 7 and 8, the other 

 between segments 8 and 9. 



Dorsal pores present, the first between segments 4 and 5. 



