On a new Species of Polytoreutua. 507 



LIX. — Deacriptionofa nfw Species of the Genus Polytoreutu^. 

 By Dr. LuiGi COGNETTI DE Maetiis, R. Museo Zoologico, 

 Torino. 



Prof. F. J. Bell, of the British Museum, has recently sent 

 me an East-African earthworm whicli I have been able to 

 recognize as the type of a new species. I wish to express 

 my tiianks to him for his kindness in sending me many earth- 

 worms which from time to time have come into his hands 

 for identification. 



Polytoreutus haralypton *. 



External characters. — Length 225 mm., thickness 4-5 mm. ; 

 number of segments 310. 



Colour white yellowish. 



Ventral setae much wider apart tlian the external setse. At 

 the X. segment aa = 2^ ah, ah = ^bc, ad equal to half of 

 the whole circumference. At the middle region of the body 

 aa = '2 ah = bc, ad always = i circumference. Nephridial 

 pores in the lines of the lateral bundles of setae. 



Clitellum developed all round the body and occupying 

 segments xiii. to xviii. 



A single male pore on intersegmental furrow xvii.-xviii., 

 in the middle ventral line ; a small depressed oval area 

 surrounds this pore. 



Female pores are not recognizable. They lie in the inter- 

 pegmental furrow xiv.-xv., and are, ventrally, near to the 

 lines of nephridial pores. 



A single spermathecal pore behind the male pore upoii 

 intersegmental furrow xviii.-xix. It is surrounded by a 

 whitish ring. 



Internal anatomy. — Septa v.-vi. to xi.-xii. a little thick- 

 ened. 



A strong gizzard lies in the v. segment. 



Unpaired oesophageal glands or ventral pouches {" Chylus- 

 taschen ") in segments ix., x., and xi. ; a pair of calci- 

 ferous glands in the xiii. segment, developed around the 

 oesophagus, but interrupted in the dorsal and ventral middle 

 lines. 



Dorsal vessel single ; large hearts in the x. and xi. segments. 



A pair of testes (? free) depends in the xi. segment from 



* Philosophical term. 



