274 Transactions. — Zoology. 



meeting in the median ventral line so as to form a dumb-bell- 

 shaped accessory copulatory structure. 



The spermathecal pores are between segments 7/8 and 8/9, 

 close to the ventral line, in line with chaetal gap b/c. On seg- 

 ments 10, 11, and 12, in line with these pores, is a series of 

 pale areas, each with a slight pitting in its centre, indicating 

 copulatory tubercles. 



I did not find the oviducal pores. 



Dorsal pores commence behind segment o. 



Internal Anatomy. 



The dorsal vessel is single. The last heart is in seg- 

 ment 12. I did not note the total number of hearts. 



The gizzard is small, thin-walled, cylindrical, and occupies 

 segment 5. 



The oesophagus is slightly dilated in segments 13 and 14, 

 though no definite gland is formed. 



The intestine commences in the 16th segment. 



The worm is micronephric, and anteriorly is a large 

 glandular body, which is probably a pepto-nephridium. 



The Reproductive System. — The testes, ovanes, funnels, 

 and ducts are in the usual positions. 



Two pairs of botryoidal sperm-sacs lie in segments 9 and 12, 

 while the intervening segments were occupied by loose sperms. 



The prostates, or spermiducal glands, are small, limited to 

 the 18th segment. Each is flattened, lobulated, with a short 

 muscular duct, near the origin of which there is a distinct 

 separate lobule of glandular substance, so that the gland is 

 unequally bilobed. 



I observed no penial chsetae. 



The spermathecae are two pairs, in the 8th and 9th seg- 

 ments respectively. Each consists of a globular copulatory 

 sac, with a single elongated diverticulum opening by its own 

 duct into the short duct of the copulatory sac. 



Remarks. 



In some respects this worm agrees with M. minor, 

 Spencer,* from Queensland — e.g., in its small size, number of 

 chgetae, position of dorsal pore, absence of oesophageal glands, 

 and number of spermathecae and of anterior copulatory 

 glands. On the other hand, Spencer describes vascular 

 swellings of the oesophagus in segments 8, 9, and 10, and a 

 bilobed, equilobed, spermiducal gland. He makes no refer- 

 ence to copulatory glands on the 17th segment, which are 

 so conspicuous in the present species. 



For explanation of figures, see pp. 289, 290. 



* Baldwin Spencer, "Further Descriptions of Australian Earth- 

 worms" (Proc. Roy. Soc. Victoria, 1900, xiii. (n.s.), p. 49). 



