DESCRIPTIONS OF GENERA AND SPECIES 375 



(7) Megascolex (?) canaliculatus (FLETCHER). 



Perichaeta canaliculata, FLETCHER, ibid., p. 391. 



Definition. Length, 145 mm.; breadth, 8 mm. ; number of segments, 160. Clitellum, 

 XIII-XIX. Setae, 16. No genital papillae. Dorsal pores, V/VI. Gizzard in VI; 

 calciferous glands not very distinct in IX-XV ; intestine commences in XVII, spirally 

 coiled. First septum, IV/V ; septa VII/XV thickened. Last heart in XII. Sperm-sacs in 

 XI, XII ; sperm-reservoirs in X, XI. Spermathecae in VII/IX opening at fifth seta, with 

 short, club-shaped caecum. Ilab. Mossman River, N. Queensland. 



This species seems from FLETCHER'S description to have a spermiducal gland on 

 the plan of that of M. cingulatus; but it is not quite certain. The nephridia are 

 stated to be paired structures ; there may, however, as in M. armatus, be a pair of 

 large nephridia besides the smaller tubules. A pair of what seem to be egg-sacs are 

 described by FLETCHER in segment xiii. They would appear to be unusually large ; 

 they contained 'granules, granular cells, and encysted parasites.' I leave it in 

 Megascolex for the present until the matter of the nephridia is settled. 



(8) Megascolex wilsonianus (FLETCHER). 

 Perichaeta wilsoniana, FLETCHER, ibid., p. 400. 



Definition. Length, 94 mm. ; breadth, 4 mm.; number of segments, 120. Clitellnm XIV-XVII 

 (XVIII, XIX, XX). Setae, 20-28. Genital papillae, two pairs on XVIII, and one pair 

 on XVII and XIX. Other characters as in M. austrinus, save that there is an additional 

 pair of calciferous glands. Ilab. Mt. Wilson. 



(9) Megascolex fecundus (FLETCHER). 

 Perichaeta feeunda, FLETCHER, ibid., p. 401. 



Definition. Length, 65 mm.; breadth, 3-5 mm.; number of segments, 115. Clitellum, 

 XIII-XVII. Setae, 20-24 in front of clitellum, 28-30 behind it. Genital papillae on 

 X, XI, XVII-XXI. First dorsal pore, IV/V. Calciferous glands in X-XIV ; intestine 

 begins in XVI. Last pair of hearts in XII. Sperm-sacs in IX, XII ; spermathecae in 

 VI-IX, with diverticulum of same length as pouch-opening slightly dorsal of seta 2. 

 Spermiducal glands ' two, in XVIII, XIX.' Hob. Mt. Wilson, Lawson, N. S. Wales. 



The second of the two papers [6] upon this species deals with what FLETCHER 

 deems a variety, to which, however, a distinct name is not given ; it differs from 



