166 MONILIGASTER COERÜLEUS, 



NOTE XXV. 



ON MONILIGASTER COERÜLEUS HORST 

 (MONILIGASTER VIRIDIS BEDDARD) 



Dr. R. HORST, 



In my description of' this large earthworm from Borneo ^) 

 I made already the suggestion , that the species probably 

 did not belong to the genus Moniligaster , but I preferred 

 to range it provisionally in this genus till we were better 

 informed about the characters of several Moniligaster-s^e- 

 cies, only briefly described by Bourne. Since this author 

 published a detailed account of the anatomy of Moniligas- 

 ter grandis and a dozen of other species of this genus, 

 found in S. India. They all agree in the situation of the 

 oviducal pores between segment XI and XII and in the 

 structure of the prostata. There now remains for me no 

 doubt , that the Borneo-worm , which differs not only by 

 the position of its oviducal pores upon segment XIII , but 

 also by having a totally diff'erent prostata, cannot belong 

 to the genus Moniligaster, but must be ranged in an other 

 genus , for which I propose the name of Polygaster, 



I think that the Moniligaster viridis from Serawak , 

 afterwards described by Beddard in his Monograph of the 

 Oligochaeta, p. 203, will prove to be identical with our 

 Polygaster coeruleus. 



Leyden Museum, December 1895. 



1 Notes Leyden Museum, Vol. XVI, 1895, p. 137, pi. 7. 



Notes from the Leyden IVluseum, Vol. JXVII. 



