George W. Bartelmez 85 



(17) These "corpuscles" do not appear to be the follicular epithelial cells, which could 

 hardly have been resolved by Purkinje's lenses. In a 9 mm. hen's oocyte on which I have 

 tried to repeat his observations the capillaries were so disposed as to give a punctate appear- 

 ance to the theca interna when viewed horn the inner surface at low magnification. 



(18) The pendant ovarian follicle is completely enfolded by the rhythmically contracting 

 fimbriae for some time before ovulation as well as during this momentary event itself. 

 (Coste;^* Bartelmez^*). As von Baer says, "so schliirft sich der Eileiter des Huhns die Dotter- 

 kugel ein" (von Baer,^^ vol. II, p. 29). 



(19) This passage has been translated by A. W. Meyer,^ p. 130. Purkinje wrote: "Ast oh- 

 senationis lacunas opinionum commenla non supplebunl." This aphorism replaces several 

 sentences of the 1825 edition. One of these is worth quoting: "This fluid of the cicalricula 

 of the [laid] egg is by no means to be confused with the vesicle of the ovarian ovulum which 

 I have been describing, although Buffon and Malpighi express themselves in such a way that 

 anyone who confines his attention to words rather than things might easily exclaim 

 [clamitef] about my repeating old stuff [crambem]." Purkinje's crisp and conclusive pres- 

 entation of his discovery was fully accepted by all who understood the matter. 



(20) A gibe at Carus, Pander, Joerg, and others who still believed that the ovum drops 

 from its ovarian pedicle like an apple from the tree and that the follicular envelopes be- 

 come the shell membranes. It was based on an interpretation of a passage in Aristotle (see 

 Adelmann,^ notes 5-10, pp. 698-700). Meckel von Hemsbaclr''' (1851), von Nathusius''*-^' (1885), 

 and others who saw only what they wished to see, continued this myth. 



(21) The idea is a development of the Aristotelian tradition which homologized the chalaza 

 with the mammalian umbilical cord. It was developed by Bellini*" and Maitre-Jan^ in 1722 

 and was revived by Leveille. 



(22) This is the usual condition in pigeons' eggs, especially at the last formed chalaza 

 (that of the blunt end) which when present at all is always the smaller. Harvey,^" following 

 Fabricius, says that the chalaza at the blunt end is the larger, but Bellini correctly describes 

 the relations in his "Digressio de ovo."^^ 



(23) This was forgotten and much printer's ink was wasted (see Banclmez," p. 331). 



