450 Transactions of the Society. 



Brachionus, possessed a remarkable variety of forms of B. angularis 

 and of its variety caudatns. ' ■ ; 



In these families 23 species were collected — 19 in Brazil, 10 in 

 Chile, 3 in Argentina. Mne of these are first records for South 

 America. 



There are 35 previous records in these families, making a total 

 of 44 species. 



LIST OF SPECIES COLLECTED. 



New records for South America marked with an asterisk. 



In Brazil. 



Metopidia scdpina Ehr. *B. falcatus Zach. {66). 

 *M. triptera Ehr. B. anynlaris Gosse. {59). 



*M. rhonihoides Gosse. B. hakeri Miill. {63). 



*M. qninquecostata Lucks. {62). *B. trahecc sp. n. 



Pterodina patina Miill. Noteus quadricornis Ehr. ('56"). 



* Bracliionus mollis Hempol {60). N. niilitaris Ehr. 

 *B. pala Ehr. Anursea acideata Ehr. {58). 



*B. mulleri Ehr. A. cochlearis Gosse. {59). 



B. urceola.ris Miill. * Anuraeopsis hypelasma Gosse. 



B. rithcns Ehr. 



In Akgentina. 



Metopidia lepadella Ehr. Brachionus miUleri Ehr. 

 M. triptera Ehr. 



In Chile. 



Metojndia scdp)ina Ehr. M. triptera Ehr. 



M. solidus Gosse. Brachionus hakeri Miill. 



M. lepadella Ehr. B. pala Ehr. 



M. rhomhoides Gosse. Anurdea cochlearis Gosse. 



M. acuminata Ehr. Notholca striata Ehr. 



Notes on the Species. 

 Metopidia qninquecostata Lucks {62). 



The species is unmistakable, with its five elevated ridges. I 

 do not figure the species here as it is to be figured in a subsequent 

 paper on Autralasian Eotifera in this Journal (Plate XIX, fig. 9). 



* The figures in brackets refer to the Bibliography at the end of the paper. 



