DESCRIPTIONS OF GENERA AND SPECIES 385 



Penchaeta (s. s.). As, however, the details given by Pekeiee of the above-men- 

 tioned species are slight, I do not include them in the list of synonyms of M. armatus. 



(37) Megascolex ceylonicus (Beddaed), 



Periehaeta ceylonica, Beddaed, Ann. Mag. Nat. Hist., Feb. 1886, p. 89. 



Definition. Length, 335 mm.; diameter, 10 mm. Clitellum, XIV-XVII. Setae forming 

 continuous rows, 51 per segment in posterior region of body. Dorsal pores present. Last 

 hearts in XIII. On XVIII two pairs of male pores, with no setae between them, ; from the 

 posterior protrude penial setae. Two pairs of spermiducal glands correspond to these, the 

 anterior of which are tubular, the posterior lobate. One pair of spermathecae in IX with 

 a single diverticulum. Hob. — Ceylon. 



This species was described by myself from a single badly-preserved specimen. 

 I have unfortunately no record of the position of the gizzard, which would be of 

 importance in relation to its systematic position. There appeared to be no dorsal 

 gap in the line of setae, and only a very feebly indicated ventral gap. The relations of 

 the sperm-ducts to the spermiducal glands were not discovered ; the penial setae which 

 are connected with the second, lobate, gland, are marked near to the free extremity with 

 a number of minutely denticulate ridges ; at the very tip are a series of chevron-shaped 

 ridges with the angle turned towards the tip. The nephridia appear to be diffuse, and 

 no larger tufts of tubules were found, such as occasionally occur in this genus. 



(38) Megascolex madagaseariensis (Michaelsen). 

 Periehaeta madagaseariensis, Michaelsen, Arch. f. Nat., 1891, p. 337. 



Definition. Length, 80 mm.; diameter, '^•^ mm,.; number of segments, 185. Clitellum, 



XIII-XVIII. Oviducal pore single. Penial setae cleft at extremity, and with numerous 



blunt straight spines. Spermathecae in VII, VIII, IX, each with two diverticula. Hob. — 



Madagascar. 



This species was described by Michaelsen from a single poorly-preserved specimen. 



Hence a number of important details are necessarily wanting. The segments occupied 



by the clitellum are queried by Michaelsen. The gizzard is said to be about in the 



fourth segment. The species evidently comes very near to my M. armatus. The 



only differences appear to be in the single oviduct and in the form of the penial 



setae; the spines upon these would seem to be shorter and blunter in the present 



species. 



3c 



