SECOND LECTURE. 129 



same as tliat found in the brain of slieep, in tiie 

 liver of hares, of mice, etc. But Zeder, having ex- 

 amined them very attentively, found that the crown 

 of fangs f crotchets J is single in the social vesicular 

 human worm. 



See the itwrJc cited, p. Si2, pi. 11,/^. v, vii; 

 while in the social vesicular worm of animals we 

 see this crown double, as may be observed in the 

 figures published by Goeze, and which I have an- 

 nexed to these Lectures, see pi. II, fig. xv. e, xvi. e f, 

 xvii. f. Zeder has characterised the social human 

 worm in the following terms : " Polycephalus co- 

 rona uncorum simplici, capite imperforato, corpori- 

 busque pyriformibus." 



(28) Traite de la generation, etc. p. 7^. 



(^9) Versitch. JWitiirgeschicthe, etc. p. 111). 



(30) See Goeze, the work cited, p. Ii7. 



(31) Goeze,the work cited, p. i2i2, 



(32) See ^ XXXiy. 



(33) Goeze, the work cited, p. 97 and 103. 



(34) Goeze, the work cited, p. iOS. 



(35) Zeder, Erster JS^achtrag zur J\%turg. 

 der Eingew. etc. p. 25. 



(36) See § XLITI. 



(37) Traite de la gen. etc. p. 89. 



(38) See Pallas, Acta Helvetica, torn, i, p. 59. 



(39) Medicina clinica; Ticini, 1794/, v. i. 

 p. 142. 



(10) Ilartmann, in Miscell. nat, cur. ; dec, 1, 

 ann. 6 and 7? ohserv. 189. 



4 f^ 



