DESCRIPTIONS OF GENERA AND SPECIES 383 



Definition. LengtJi, 80 mm.; breadth, 3 mm,. First dorsal pore, V/VI. Oviducal pores 

 double. Genital papillae, Xril/XFIII and XFIII/XIX, .in front of and behind male 

 pores. Hab. — Ceylon. 



SCHMAEDA relied principally upon the form of the setae to distinguish this species 

 from the last. It is not however safe, in the present state of our knowledge, to use 

 this as a character. Sohmaeda's type was afterwards examined by myself, but 

 I could detect hardly any diflferences between it and M. cingulatus. I was not able, 

 however, to study the internal anatomy. As, however, there are colour differences, 

 it is perhaps legitimate to retain it, at least provisionally, as a distinct form. It 

 appeared to me that the dorsal and ventral gaps in the setae were not quite so well 

 marked as in M. cingulatus, and that the genital papillae were not so exactly in 

 line with the genital orifices. 



{33) ]Vfegascolex iris, Michablsen. 

 M. iris, MiCHAELSEN, Arch. f. Nat., 1892, p. 244. 



Definition. LengtJi, 240 mm.; breadth, (jmm.; number of segments, 240. Setae with a dorsal, 

 but without a ventral, interruption; the ventral setae are small and closer together than the 

 more dorsally placed setae, which are at the same time larger. Glitellum, XIII-XVII. 

 Dorsal pores commence XII/XIII. Male pores close together on XT III ; genital papillae 

 two pairs on the intersegmental furrows XIX/XX, XX/XXJ, close to median ventral line. 

 Oviducal pore single and median upon XIF. Gizzard in VIII-X [?). Three pairs 

 of spermathecae in VII-IX; each with a single diverticulum. Hab. — Samar, Loquilocun. 



This species is not so satisfactorily proved to be a Megascolex as are some others ; 

 the median oviducal pore is a character of Perichaeta, though the fact that in 

 M. coeruleus this pore is sometimes single and median must be borne in mind. The 

 position of the gizzard is that of Ferichaeta; the query as to its segments in the 

 above description is, it should be remai'ked, that of Miohaelsen ; this applies also 

 to the following species. 



(34) Megascolex margaritaceus, Miohaelsen. 

 M. margaritaceus, Miohaelsen, ibid., p. 345. 



Definition. Length, 1^0 mm. ; breadth, 5 mm.; number of segments, 10. The setae are larger 

 andfwrther apart dorsally than ventrally ; there were 25 on a segment of the anteclitellian 

 region. Glitellum, XIII-XVII. Genital papillae closely applied pairs upon the inter- 

 segmental furrows, IX/X, X/XI, XII/XIII, Xrill/XIX, XIX/XX. Gizzard in VIII-X {?). 



