DESCRIPTIONS OF GENERA AND SPECIES 439 



commence V1II/IX. Gizzard doubtful (? rudimentary in VI as in other species); 

 calciferols gland in XIII. Nephridia alternate in position ; ventral series with a short 

 terminal sac, dorsal series with a long sac. Spermathecae in VII, VIII, IX, with a small 

 diverticulum . Spermiducal glands extend through segments XVII-XIX. Hab. Zanzibar. 



(8) Perionyx saltans, BOUENE. 

 P. saltans, BOURNE, P. Z. S., 1886, p. 669. 



Definition. Length, 60 mm.; diameter, 6 mm.; number of segments, 61. Clitellum, 



XIV XVI. Setae, 45-54 per segment. Nephridia alternate in position. Spermathecae 



in VII, VIII, IX, each with two minute appendices. No modified setae. Hab. Nilgiris, 



India, 7,500 feet. 



Although BOURNE'S description of this species is far from complete, there is no 



possibility of confounding it with any other species. The worm is said to have the 



same active habit as Perichaeta, whence its name. 



Genus DIPOB.OCHAETA, BEDDARD. 



Syn. Perichaeta (in part.), BEDDARD. 



DEFINITION. Clitellum generally more than three segments. Nephridia paired. 

 Spermiducal glands tubular. 



This genus includes one species which is a native of New Zealand, and some of 

 the species provisionally referred by FLETCHER and SPENCER to the genus Perichaeta, 

 viz. Perichaeta barronensis, &c. A few species have a very limited number of setae 

 on anterior segments. 



(i) Diporochaeta intermedia (BEDDARD). 

 Perichaeta intermedia, BEDDARD, Q. J. M. S., vol. xxx, 1890, p. 467. 



Definition. Length, about 6 in. ; a stout species. Colour during life a bluish green. Dorsal 

 pores absent. Setae with slight dorsal and ventral gaps, about 75 on posterior segments. 

 Between the male pores only a single seta on each aide. Calciferous glands in X/XI. 

 Septa, VIII/XV, thickened. Last heart in XII. Sperm-sacs in IX-XII. Spermathecae 

 in V-VIII. Hab. New Zealand. 



This species has a number of genital papillae in neighbourhood of the male pores. 

 There are a pair upon the eighteenth segment, just in front of the male pores ; another 



