224 W. B. BENHAM. 



Sperm- sacs. — Four pairs in Somites xi, xii, xiii, xiv (in 

 one species a less number has been described). 



Prostates tubular, and very greatly coiled. 



[Prostomium broad, not dovetailed into peristomium. 

 Dorsal pores are present. 



Testes and ciliated rosettes in Somites x, xi, free ; the two 

 sperm-ducts on each side are separate throughout their course, 

 only uniting at their junction with the prostate. 



Spermathecse, with appendices, two pairs in Somites viii 

 and IX (or four pairs). 



The nephridia are in form of network anteriorly, continuous 

 from somite to somite, one tubule of which gradually enlarges 

 till posteriorly there is a pair of large nephridia, together with 

 a network of small tubules in each somite. 



Gizzard in Somite v or vi; no oesophageal glands ; no typhlo- 

 sole. 



Intestine dilated in Somites xii to xviii. 



Numerous intra-buccal pepto-nephridia are present. 



The septa of anterior segments greatly thickened.] 



Species 1. M. australis, McCoy, 1878; Australia. 



'2. M. camdenensis, Fletcher, 1886; Australia. 



3. M. grand is, Fletcher, 1886; Australia. 



4. M. tasmanicus, Fletcher, 1887 ; Australia. 



5. M. tuberculatus, Fletcher, 1887 ; Australia. 



6. M. mawarrse, Fletcher, 1887 ; Australia. 



7. M. pygmseus, Fletcher, 1888; Australia (? genus). 



8. M. illawarrse, Fletcher, 1888; Australia. 



See Baldwin Spencer, ' Trans. Roy. Soc. Victoria,' vol. i, 

 1888 ; and Fletcher, ' Proc. Linn. Soc. N.S.W.,' vols, i and iii. 



Genus 3. Cryptodrilus, Fletcher, 1886. 



Set 86 separate. 



Clitellum on Somites xiii to xvii (or less), complete ven- 

 trally. 



Male pores on Somite xviii, not on papillaj; no penial 

 setae. 



