List of New Rotifers since 1889. By G. F. Rousselet. 451 
always, and even rarely, be made out in the living animal, but they 
are readily dissolved out with a drop of potash solution. 
Badly described and ill-figured species are worse than useless : 
they increase the difficulties and waste the time of observers, swell the 
literature, and are then dropped. 
I trust this list, with Bibliography attached, compiled with much 
care and labour from the widely scattered literature, and containing 
all new forms known to me to the end of June, will be useful to all 
workers on the Botifera, and that it will prevent the same species 
being described several times under different names. Ehrenberg’s 
j Euchlanis lynceus has been renamed three times within the last two 
years, and some of the animals associated with it in the three new 
genera are probably also identical. The numbers refer to the 
Bibliography at the end.* 
Rhizota. 
Floscularia torquilobata Thorpe (41). 
„ quadrilobata Hood (18). 
„ Gossei Hood (18). 
„ annulata Hood (17). 
„ diadema Petr. (36). 
„ Evansonii Anderson (2). 
„ spinata Hood (19). 
„ tenuilobata Anderson (1) (= F. Goronetta). 
„ pelagica Rousselet (40). 
„ unilobata Wierzejski (51). 
Limnias myriophylli Western (48). 
( Ecistes Stephanion Anderson (1). 
,, Wilsonii Anderson and Shephard (2). 
„ brevis Hood (40). 
Lacinularia natans Western (47). 
„ megalotrocha Thorpe (42). 
„ racemovata Thorpe (42). 
„ reticulata Anderson and Shephard (2). 
Cephalosiphon furcillatus Kellicott (27) ( = (Ecistes ptygura Ehr.). 
Megalotrocha procera Thorpe (42). 
„ spinosa Thorpe (42). 
Gonochilus unicornis Rousselet (39). 
Trocliosphsera solstitialis Thorpe (42). 
New Genera. 
Odotrocha speciosa Thorpe (42). 
Atrochus tentaculatus Wierzejski (52). 
* In view of the difficulty and delay in knowing of all the papers on Rotifera 
that are published in various parts of the world, and for the purpose of extending 
this list at a future date, I shall be greatly obliged if authors will be good enough 
to send me a copy of their memoirs addressed to the care of the Society. 
