Sei e Osborn RIONEURUM LRIS, BEDDARD,. 
By J. STEPHENSON, M.B., D.Sc. (Lond.). 
I recently received from Dr. Annandale for examination a 
tube of worms which had been taken at Kurseong in the Eastern 
Himalayas. These I believe to be the species first described by 
Beddard from the Malay Peninsula, in 1901, as Bothrioneuron iris ; 
Michaelsen subsequently examined some specimens of the same 
form from Kurseong. 
These appear to be the only occasions on which this species 
has been met with ; the material at the disposal of the investigator 
does not seem in either case to have been large in amount, since 
Beddard speaks of finding spermatophores in three out of six 
mature examples, and Michaelsen had one mature and a number 
of immature specimens at his command. 
The collection sent to me from the Indian Museum comprised 
a considerable number of individuals, of which perhaps a third 
were sexual. I have been able to note a certain number of varia- 
tions from the original description; and it seems worth while 
therefore to add the following short account to the existing litera- 
ture of this form 
Bothrioneurum iris, Beddard. 
1901 Bothrioneuron iris, Beddard, Proc. Zool. Soc. Lond., 
L90L, Vols tps OF: 
1909 Bothrioneurum tris, Michaelsen, Mem. Ind. Mus., 
Vols 1, No: 3 <p. 535. 
The present specimens were whitish in colour in the preserved 
condition ; after transference to oil of cedar preparatory to ex- 
amination by transparency or imbedding, the posterior half of a 
number of specimens was darker than the anterior, in fact was 
blackish. 
The longest specimens measuied about one inch ; the worms 
were moderately stout. Annulation distinct. A number of epizoic 
Ciliata, not unlike Spzvochona in general form, were attached to a 
number of individuals, perhaps to most, near their posterior end. 
Segments about 64. Prostomium semicircular. The surface 
of all the individuals shows a number of blisters, or raised patches 
of epithelium, probably due to the method ot fixation (Perenyi’s 
fluid). 
Set@. Both dorsal and ventral series are of the same type, 
double-pronged and doubly curved in the usual [-shape: both 
