DESCRIPTIONS OF GENERA AND SPECIES 377 



this species FLETCHEB has given a short description of the cocoon (see p. 6). The 

 largest specimens came from Eltham, and in these there were no copulatory struc- 

 tures on segments x, xi (i) 1 . 



(13) Megascolex tenax (FLETCHER). 

 Periehaeta tenax, FLETCHER, ibid. (2), vol. i, 1886, p. 953. 



Definition. Length, 157 mm. ; breadth, 6 mm.; number of segments, 150. Clitellum, 

 XIII-XVII, with setae. Setae, 36-60. Male pores in line with seta i. Genital 

 papillae four on each of segments IX, X, a pair sometimes also on XI, on XVII, XIX a pair 

 of circular depressions, a single one on XVIII. Dorsal pores begin IV, V. Calciferous 

 glands in XI-XIII ; intestine begins in XVI. Septa VII/XIV thickened. Dorsal vessel 

 shows indications of being double in parts ; hearts in XXII. Sperm-sacs in IX, XII. 

 Spermathecae in VIII, IX, opening in line with seta 2 or 3, caecum short. Hob. Auburn, 

 near Paramatta, Cumberland County, Springicood Blue Mts., N. S. Wales. 



See also FLETCHER (6). 



(14) Megascolex austrinus (FLETCHER). 

 Perichaeta austrina, FLETCHER, ibid., p. 956. 



Definition. Length, 90 mm.; breadth, ^'mm.; number of segments, 128. Clitellum, 

 XIV-XVI1. Setae, 16 in front of clitellum, 20-40 behind. Genital papillae on IX, 

 XXVII, XIX. Spermathecae in VII IX, opening in line with seta 2, caecum long. 

 Other characters as in M. australis. Hob. Burrawang, N. S. Wales. 



(15) Megascolex gracilis (FLETCHER). 

 Perichaeta gracilis, FLETCHER, ibid , p. 958. 



Definition. Length, no mm. ; breadth, 4-6 mm.; number of segments, 155- Clitellum, 

 XIII-XVI. Setae, 20-24. Genital papillae single in XVI/XVII-XVIII/XIX, and 

 a pore in middle of XVIII. First dorsal pore, V/VI. Gizzard in VI ; globular glands 

 in XII-XV ; intestine begins in XVII. Sperm-sacs in XI, XII. Last heart in XII. 

 Spermathecae in VII-IX, opening in line with seta 4 or 5, with long caecum. Spermi- 

 ducal glands long, reaching from XVIII-XXIV, duct ^-shaped. Hal. Auburn, near 

 Paramatta. 



FLETCHER states that the oviducal pores are paired at the end of his description, 

 but that there is a single pore at the beginning (p. 959). 



1 Nothing is said about segment xi in the original description. 



3C 



