Xotes on Victorian Rotifers. 75 



looks a greyish -black by transmitted light. This second form 

 has veiy short antennte, and the dorsal gap is somewhat 

 wider, the edges of the corona at the gap curving somewhat 

 outwards. The distinction seems hardl}^ enough to mark a 

 new species. 



Order II. — Bdelloida. 



Family Philodinad.e. 

 (xxiii) Philodina roseola. Botanical Gardens, 

 (xxiv) F. citrina. Botanical Gardens. 

 (xxv) Rotifer vulgaris. Common, 

 (xxvi) R. tardus. Botanical Gardens. 



Order III. — Ploima (Il-loricata). 

 Family Asplanchnad.-e. 



(xxvii) As[)laiichna brigldwellii. This was first noticed 

 at Biigiiton, in July ]890. It w^as very plentiful, and 

 numerous m;des were found. It appears to occui- from June 

 to September, as the pool at Bi'igliton constantly^ visited, did 

 not yield a single specimen for nine months of the year. 

 Heidelberg yielded none, except in September 1891, when 

 they were extremely numerous. Dr. Hudson remarks that 

 his experience is, that the Asplanchnadfe do not occur in the 

 same spot year after year — (" The Rotifera," Vol. I, p. 26). 

 But for two years A. hrighttvellii has been found in the 

 same spot at Brighton. 



(xxviii) As'plancli'aopus Tnyrmeleo. Found in all open 

 pools tried, and at all times of the year, though numerous 

 only on one occasion at Brighton. 



Family Synch^tad^. 



(xxix) Synchcata pectinata. Brighton and Heidelberg. 

 (xxx) >S'. tremula. Botanical Gardens. 



