220 THE ZOOLOGIST. 
NEW BRITISH OLIGOCHATS. 
By tHe Rev. Hinpreric Frienp, F.R.M.S. 
At the end of 1911 I prepared a ‘* List of Native Oligochets,”’ 
so far as they were then known,* and found that they numbered 
almost exactly two hundred species. In round numbers we have 
up till the present recorded forty species of Lumbricide, eighty 
Enchytreide, thirty Tubificide, nearly thirty Naidide, and about 
twenty species belonging to four other families. Already several 
new worms have been discovered, and in the following pages 
some of these wil! be placed on record. In one or two instances 
the species have been noted by previous observers, but have been 
relegated to a position among uncertain species, or assigned to 
a genus or species to which they did not belong. 
1. Smnuris tinzata, Grube (Lumbricus lineatus, Miller), has 
been the despair of helminthologists. Beddard, Michaelsen, 
Vaillant, and others have all tried their hand at placing it, but 
never having seen the living creature they have only added to 
the confusion. We have two doubtful records for this worm, - 
but they both relate to that period in the study of Oligochets 
when characters were uncertain and definitions were vague. 
Dr. Johnston records it (‘ Catalogue of Worms,’ p. 66) for Ferne 
Isles, Northumberland, while it is also mentioned as having 
been found in Plymouth. Beddard alludes to it in an account 
of Clitellio, and Michaelsen at one time placed it under Pachy- 
drilus, and at another under T'ubifex. 
I have had the good fortune to find the worm on the north 
bank of the Tees near Middlesborough, and, although the month 
of February does not seem to be the right period of the year for 
finding it sexually mature, I have been able to determine its 
position, and make some additions to our knowledge of its 
structure. For the present I propose to retain the name Senuris 
lineata, Grube, because neither Clitellio nor Tubifex, Lumbricus 
* «The Naturalist,’ pp. 76-81, March, 1912. 
