72 



segmental septa. According to Beddard's and Bourne's observations, 

 M. coeruleus appears to possess only the minute nephridial tubules; 

 as to M. cingulatus, Beddard mentions nothing about the excretory 

 system. 



Perionyx Perrier. 



Setae numerous, arranged in a continuous row, which is hardly 

 interrupted. Male generative pores closely approximated, situated in 

 median ventral pit. Large, paired nephridia. Gizzard rudimentary. 



Five species of this genus are hitherto known; a sixth one P. vio- 

 laceus is described in the present paper. They may be distinguished 

 by the following characters: 



Penial setae P. grueneicaldi Mich. •) 



(Sangir, Java, Sumatra). 

 Two pairs of Spermathecae 



spermathecae without diverticulum P. excavatus Perr. 2 ). 



(P. M'Intoshn Bedd.) 

 (Saigon, Burmah, Philippines, Nias). 

 No penial setae Spermathecae 



with a single diverticulum P. violaceus n. sp. 

 (Java, Sumatra). 



I Each with a single diverticulum .... P. sansibaricus Mich. 3 ) 

 (Sansibar). 

 Each with two diverticula P. saltans Bourne. 4 ) 

 (India). 



Four pairs of spermathecae P. arborieola Rosa 5 ) 



(Burmah). 



20. Perionyx violaceus n. sp. 



Java: Buitenzorg, very common; Tjibodas. 

 Sumatra: Singkarah, very common; Manindjau; Paninggahan, in 

 the forest. 



The largest example measures 55 mm. in length; the number of its 

 segments amounts to about 115. The dorsal side of the body is violet- 

 brown , except on the clitellum , which is of a paler colour ; the ventral 

 side is yellowish- white, only the region in front of the clitellum is of 



1) Jahrb. Hamburg. Wissensch. Anstalten; Vol. VIII, 1801, p. 33. 



2) Nouv. Arch. Mus. d'Hist. Nat. T. VIIl, p. 126, PI. IV, figs. 73 and 74. Proc. Zool. 

 Society, 1886, p. 308. Ann. a. Mag. Nat. History, 1883, p. 213, PI. VIII, figs. 3 and 8. 

 Ann. Mus. Giv. Stör. Natur. Genova, 2d Ser. Vol. VI, 1888, p. 157. 



3) Jahrb. Hamb. Wissensch. Anst. Vol. IX, 1891, p. 4, PI. I, fig. 1. 



4) Proc. Zool. Society, 1886, p. 669. 



5) Ann. Mus. Civ. Stör. Natur. Genova, 2d Ser. Vol. X, 1890, p. 119, PI. I, fig. 11. 



