DESCRIPTIONS OF GENERA AND SPECIES 375 



(7) Megascolex(?) canaliculatus (Fletcher). 

 Perichaeta canaliculata, Fletchee, ibid., p. 391. 



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



XIII— XIX. Setae, 16. No genital papillae. Dorsal pores, VJVI. 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 YII/IX opening at fifth seta, with 



short, club-shaped caecum. Hob. — 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 paii'ed 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 -wilsoniantis (Fletcher). 

 Perichaeta wUsoniana, Fletcher, ibid., p. 400. 

 Definition. Length, ^4 mm.; breadth, 4 mm.; number of segments, 12,0. Clitellum 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. Hah. — 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, 30-24 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: Hab.—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 



