428 Friend : The Annelid Fauna of Worcesterslu're. 



This latter worm has had a somewhat romantic history. 

 It was first named Enterion festivum by Savigny in 1826, and 

 eleven ^/ears later Duges gave particulars respecting it under 

 the name which it now bears. It was then lost to sight for 

 upwards of half a century. At last I discovered it in England, 

 where it had never been recognised before, except very doubt- 

 fully from Berwick-on-Tweed (Johnston's 'Catalogue of Worms,' 

 p. 59). _As it was apparently new to Britain and to science, 

 I named it Litmbricus Albescens (' Nature,' 1891, p. 273). It 

 was afterwards re-discovered on the Continent, and is now 

 placed beyond all doubt. I found it some years ago in asso- 

 ciation with L. rubellus, and gave some account of my observa- 

 tions in a paper (' Naturalist,' October 1892) entitled 

 ' Hybridity among Worms,' to which Dr. Rosa (' Revisione 

 dei Lumbricidi,' p. 27), makes special allusion. The fuller 

 history of this interesting species rmy be read in various 

 journals, including the issues of the ' Bradford Scientific 

 Journal ' for the present year. - 



Found at Malvern ; and also recorded for various parts of 

 England, Wales, and Ireland, by myself. I have also received 

 it from Normandy. It is abundant around Paris. 



4. LuMBRicus CASTANEUS Saviguy, is the smallest of the 

 true Lumbrici in Great Britain. In colour and shape it is similar 

 to the last, but if the girdle segments are our guide, it comes 



28 33 



next to L. rubellus, Hoff., the fractional index being 29 _ 33 

 It is very active, and has a habit of gliding rapidly backwards 

 when wanting to avoid danger. 



It is greatly to be hoped that further research in unexplored 

 parts of Britain may bring to light other genuine species of 

 Lumbricus. L. studeri Rib. has never been reported, though 

 one does not see why it or L. melibceus Rosa, should not be 

 found. The notices of L. tyrtcBus Savigny still need confirma- 

 tion. 



It is only possible for me, in the present paper, to refer to 

 one other species, as it is necessary, for the sake of clearness, 

 to reserve all the Allobophoras for treatment together. I 

 allude to Alhiriis, a semi-aquatic worm which occurs everywhere 

 in Great Britain, and is liable to considerable variation. We 

 have undoubted evidence of the existence of more than one 

 species in these islands, but so far, the material collected has 

 been insufficient for the purposes of science. 



5. Allurus (Eiseniella) tetraedrus Savigny. This little 



Naturalist, 



