438 BI^LLETIN 120, UNITED STATES NATIONAL MUSEUM. 



Schoiiteden (1907) copies Bezzenberger's (1904) table for identi- 

 fication of Opalinidae and gives synonomy list and habitat for each 

 species, ranarum, lata, ohtrngona, dhnicUata^ coracoidea., Jonga^ ftava, 

 lanceolata, macronudeata^ intestinalis^ and caudata. 



Lebedew (1908) compares nuclear conditions in Trachelocerca 

 and " Oyalhui^'' also their reproduction. 



Dobell (1909) says: " It is certain, as Neresheimer hinted from his 

 study of Ofcdina^ that the parasites from Cephalopoda are not 

 related to OpaVina but to Anoplophryay 



Galli-Valerio (1909) mentions Oycdina ranm-nm as occurring in 

 Bufo hufo from Sondrio, Italy. 



Hartmann (1909) refers to Nersheimer's (1907) description of 

 reproductive chromidia in Opalina ranwnim and to Metcalf's (1909) 

 opposed results from study of binucleated species, and also refers 

 to Metcalf's tentative suggestion of the origin of the endospherules 

 from chromidia. 



Metcalf (1909) describes in detail the structure, mitosis, and life 

 history of Protoopalina intestmalis and P. caudata; describes the 

 structure of Cepedea dimadaata and gives some data as to its life 

 history; describes the structure of Opalina obtrigona^ some phe- 

 nomena of its nuclear degeneration, and its irregular presexual fis- 

 sions; describes the structure of Opalina ranarum and gives some 

 data as to its life history. Data are given as to infections found in 

 nature and many experiments in infecting Anura Avith C3^sts of un- 

 accustomed species of Opalinids are described; also the reactions of 

 different portions of the body and its contents to many intra-vitam 

 stains. There are included discussions of the evolution of mitosis, 

 of the nature of the plastids of Opalinids, of the phylogeny of the 

 nuclei of the Ciliata, of chromidia, of the phenomena of reduction, 

 and of the relationships of the Opalinidae. Abnormal conditions 

 are described in Opalina ohtngona^ Protoopalifna intesthudis and 

 P. caudata. There is a description of Oepedea dimidiata- form zelleri 

 [" Opalina zelleri "] and a chronological review of the literature 

 of the Opalinidae {sensu stricto) from Leeuwenhoek in 1865 to 

 Lowenthal in 1908. 



Dobell (1910) reports an unidentified, small, multinucleated 

 " Opalina'''' from Rana tigerina and describes a new species, Opalina 

 virgida, from '"'■ Rhyncophor-us maculatus'''' \Polypedates leucomy- 

 stax?^^, all from Cej^lon. 



Von Linden (1910) describes remarkable, irregular protuberances 

 ("tentacles") from the body of Cepedea dhnidiata. These are long 

 and thin, irregularly arranged and of different numbers (2, 4, 5, 6) in 

 different individuals, " usually 5." Both ectosarc and endosarc (with 

 endospherules) are present in these protuberances, which are ciliated 



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