160 OK BETSTOL ROTIFERS. 



a Pembroke table, I found once in thousands round the dam gate 

 in Abbot's pond. 



Euchlanis dilata and E. triquetra are often to be taken among 

 the water weeds that grow round a small spring at the head of 

 Abbot's pond ; but I have never found any species of Euchlanis 

 in great numbers. This beautifully transparent rotifer is generally 

 solitary, as also is its cousin Salpina. 



Binocharis pocillum is to be found in the Portbury ditches near 

 the railway station. It is fond of the water crow's-foot. 



Hydatina senta and Triarthra longiseta have no objection to 

 puddles that have drained from dung heaps ; the tormer, also, is- 

 generally to be had among the floating bits of old wood and cork 

 that are lying at the side of the Float, while the latter is to be 

 met with also at the bottom of the cleanest ponds. 



Polyarthra platijptera I have often found in one or other of 

 Garraway's ponds, and also in a pond near the railway at the 

 back of a farm house in St. George's, half-way between Portbury 

 and Pill. 



Rhimps vitrea and Pedalion mirum belong to two perfectly new 

 genera. The former I have found both at Abbot's pond and 

 and Garraway's — the latter, which is the wonderful six-legged 

 rotifer, I have never found anywhere but in the pond at the head 

 of Nightingale's Valley and in Abbot's pond : it is often at the 

 very bottom of the water. 



Asplanchna priodonta, and a new species very similar to A. 

 Sieloldii, are to be found, sometimes, in a ditch on the right hand 

 of the road from Portbury railway station to Portbury, as well as 

 in the ponds about Stoke Bishop. I found an amazing number 

 of the latter once in a farm-yard pond of Mr. Harding's, close to 

 the turnpike road. 



The Philodines (except Callidina) are to be met with every- 

 where, and only call for this remark, that in spite of their being 

 the commonest of all rotifers, their males have not yet been seen. 

 Callidina has no special habitat, and is generally found in the 

 company of the other Philodines, but is raie. 



