THE OLKJOCH^rrA OF NATAL AND ZtJLULAND. 441 



no doubt that these are the female pores, even without being* 

 able to confirm the opinion ])y anatomical sections, since the 

 material is scarcely good enough for the purpose. 



Internal Anatomy. — The septa between segments 4-9 are 

 thickened; the one between the fourth and fifth segments is 

 moderately strong, while those between segments 5-9 are very 

 strong. The septum between the ninth and tenth segments 

 is very tender, if not rudimentary or absent. 



Alimentary Canal. — A large gizzard occurs in the sixth 

 and seventh segments. The septum between the sixth and 

 seventh segments is fixed in the middle zone of the gizzard. 

 The CBSophagus bears in the ninth, or ninth and tenth 

 segments, a pair of calciferous glands which are in the form of 

 lateral globular swellings. Intestine begins in the twelfth 

 segment, and there is a large typhlosole. 



Circulatory System. — -The dorsal vessel is doubled front 

 the fifth to the tenth segment, confluent intersegmentally. 

 The last pair of hearts is in the eleventh segment. 



Reproductive System. — Male organs: one pair of 

 large spei-miducal funnels occur in the tenth segment. They 

 are enclosed in a pair of seminal chambers which extend 

 laterally and dorsally, and look like sperm-sacs. A pair of 

 fiat, rounded sperm-sacs project from the septum between the 

 tenth and eleventh segments into the eleventh segment. 



vSpermathecte are globular, they have very tender and short 

 ducts Avhich are hidden in the body- wall. 



Sexual seta? : the set^e, situated in the glandular cushions 

 of the copulatory papilla?, are enormously enlarged and are 

 transformed into sexual setae. They are about 2'5-3"4 mm. in 

 length and 85 i^i in thickness at the proximal end ; they ai'e 

 nearly straight except at the proximal end, where they are 

 somewhat bent. Towai-ds the distal end the diameter of the 

 seta gradually diminishes to about oi5 fi. The terminal portion 

 is somewhat flattened laterally but broadens in the vertical 

 direction to about 42 ^t ; it is then turned obliquely, or nearly 

 transversely, and ends in an acute point. In profile the distal 

 end is like a bird's head with a short and acute beak. The 



