ON THE ANATOMY OF ALLURUS TETRAEDRUS. 365 



On the Anatomy of Allurus tetraedrus 

 (Eisen). 



By 



Frank E. Beddard, UI.A., 



Prosector to the Zoological Society, and Lecturer on Biology at Guy's 



Hospital. 



With Plate XXV. 



Allurus was first recognised as a distinct genus by Eisen, 1 

 who described the worm from specimens found in Sweden. It 

 has since been recorded by Dr. Rosa, 2 from Northern Italy ; 

 as it is probably identical with Hoffmeister's 3 Lumbricus 

 agilis, it occurs also in North Germany and in Great Britain 

 and France. 



The specimen described in the present paper comes from the 

 island of Tenerife. I received it alive with a number of other 

 specimens of Lumbricus and Allolobophora from the 

 Rev. C. V. Goddard, who was good enough, at the request of 

 Mr. Stogdon, of Harrow, to furnish me with a sample of the 

 earth-worm fauna of Tenerife. 



The papers already referred to contain no account of the 

 internal anatomy of Allurus, and I am not aware that we at 

 present possess any knowledge of its structure. 



I have thought it worth while, therefore, to publish the 

 following notes. 



With regard to external characters, I have little to add to 



1 'Ofv. af Kongl. Vetensk. Akad. Forh.,' 1870, p. 966. 



2 ' I. Lumbricidi del Piemonte,' p. 51. 



3 ' Die bis jetzt bekannten Arten aus der Familie der Regenwurmer,' p. 36. 



