620 PROCEEDIISrGS OF THE NATIONAL MUSEUM vol.87 



rapidly and with less evident stages. (7) In the adult there is no 

 pellicula, but instead a tough, cheeselike condition of the plasma 

 itself, which serves to retain form of the body. (8) Drying causes 

 prompt gelation of the plasma. (9) There appears to be a centrum 

 for cilia movement at the anterior end of the body, apparently in 

 the growth zone of the cilia. (10) The ectoplasmic and entoplasmic 

 inclusions seem to be stages of one and the same secretion process. 

 (11) Bhatia's doubtful report of isogametes is quoted with approval 

 [not confirmed by recent students]. (12) The fibrils associated with 

 the rows of cilia on the upper side of the hodj are not continuous with 

 those on the under side, but the two sets meet and join, at irregular 

 intervals, a coarser transverse fiber at the anterior edge of the body. 

 The paper contams important details of cytology and development 

 not here mentioned. The author does not call attention to it, but 

 one observes the fact that, in his careful detailed drawings, no single 

 instance of apparent fission of endosarc spherules is shown [see 

 Horning, 1937] [many statements of de Meyer need confirmation.] 



Metcalf, 1929a, published in full the paper abstracted in MetcaK, 

 1928c. Cobb's paper, 1904, and Alavor's, 1916, should have been 

 included in the discussion. 



Metcalf, 1929b, pointed out that the Opalinidae are pivotal forms, 

 instructive, first, as to the origin of the Euciliata, and, second, as 

 parasites that, along with their anuran hosts, lend themselves with 

 peculiar advantage to host-parasite studies of paleogeography. 



Metcalf, 1929c: The occurrence of a reputed leptodactylid, Heleo- 

 phryne, in South Africa, while the home of this family is in South 

 America and Australia, is discussed as a bit of evidence that a South 

 Africa-Patagonia connection was present and that it persisted until 

 somewhat later than is usually thought, that is, into the Cretaceous 

 period, or possibly the Tertiary, provided that Heleophryne is, indeed 

 a leptodactylid. 



Higgins (1929) quoted Metcalf's observations (1926) upon a 

 succession of larval forms in the development of Opalina larvarum, 

 forms that repeat the phylogeny of an Opalinae latae, and compares 

 with these phenomena the very divergent forms of Nyctotherus 

 cordiformis found in larvae of American frogs and toads. 



Haye, 1930, quoted with disapproval van Overbeek de Meyer's 

 [mistaken] suggestion that the "excretory canals" [not canals] of 

 Cepedea dimidiaia are artifacts. Haye foimd none present in Opalina 

 ranarum [cf. Konsuloff to the contrary, 1922] He [mistakenly] calls 

 the endosarc spherules macronuclei. The excretory apparatus he 

 attributes to degeneration [error, though in individuals kept under 

 unfavorable conditions it may increase in size]. He [mistakenly] 

 interprets the cytomicrosomes as bacteria. 



J 



