DESCRIPTIONS OF GENERA AND SPECIES 439 



commence VIII/IX. Gizzard doubtful {? rudimentary in VI as in other epeciea); 

 calciferous gland in XIII. Neplridia alternate in position i ventral series with a sJiort 

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

 diverticulum. Spermiducal glands extend through segments X7II-XIX. Hah. —Zanzibar. 



(8) Perionyx saltans, Bourne. 



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



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

 XIV-XFI. Setae, 45-54 p>er segment. Nephridia alternate in position. ' Spermathecae 



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



India, "j, ^00 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 Perickaeta, whence its name. 



Genus Diporochaeta, Beddard. 

 8yn. Periehaeta (in part.), Beddard. 



Depinition. Clitellum generally more than three segments. Ifephridia 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 Periehaeta, 

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

 on anterior segments. 



(i) Diporochaeta intermedia (Beddard). 

 Periehaeta 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 side. 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 



