LIST UK ROTIFER A FROM YARMOUTH DISTRICT. 
383 
XVIII. 
LIST OF ROTIFERA FROM YARMOUTH DISTRICT. 
By H. E. Hurrell. 
Read 25 th February, 1002. 
On account of their habits, and form of locomotion, Rotifers 
have been divided into the following orders, viz. : — 
ORDER I. — Rhizota, or F'ixed species. 
ORDER II. — Bdelloida, or those Creeping like a leech. 
ORDER III. — 1’loima, or those Swimming by means of the 
crown of cilia with which they are furnished. 
ORDER IV. — Scirtopoda. Swimming as Ploima and also 
skipping. This order at present contains but two species, neither 
of which has been found in this district. 
The following species have all been found by myself during the 
years 1900 — 1901. 
ROTATORIA. 
Order I. — RHIZOTA. 
FLOSCULARIADiE. 
Flo8CULaria ornata. Ditches, Southtown and Cobholm. 
Campanulata. 
Stkphanoceros f.iohornii. River Waveney at Beccles. 
MeLICERTID/E. 
Melicerta ringbns. River Yare, Brundall. 
Lacinularia socialis. River Waveney at St. Olaves. 
Megalotrocha albo-flavicans. River Waveney at Beccles. 
Limn ias ceratophylli. River Waveney at Beccles. 
CEcistes crystallinus. Various. 
Conochilus volvox. Ormesby Broad. 
.. unicornis. 
