HELMINTHOLOGY. 447 



Helminthology, made up to tlie present time. (Lehrbuch 

 der Physiologic des Menschen. Bd. ii, 1844, p. 833.) 



But as novel ideas are always prone to excite too great 

 enthusiasm, and when nourished too luxuriantly to branch 

 out into monstrous excrescences, thus it has unfortunately 

 happened in the present instance. Klencke, desirous of 

 reaping at one swoop the entire harvest of this as yet but 

 little cultivated field, has come forth with an astounding 

 array of facts, from which it would be made to appear that 

 the origin of Entozoa was dependent upon the active or 

 passive migration of their ova. (Klencke, Untersuchungen 

 und Erfahrungen im Gebiete der Anatomic, Physiologie, 

 Mikrologie, und wissenschaftlichen Medizin. Bd. i, Mikrosk. 

 pathologis. Beobachtungen iiber die Natur des Kontagiums, 

 p. 144.) At the same time, however, he has not denied 

 that many parasitic animals are produced de novo, morbid 

 fermentative processes producing abnormal corpuscular cells 

 which become individualized as animals (ib. p. 148). In a 

 larger work (Ueber die Kontagiositat d. Eingeweidewiirmer, 

 1844) Klencke sets himself to inquire in what relation the 

 Entozoa stand with respect to the morbid phenomena of the 

 organism infested by them. This work swarms with mani- 

 fest errors, to which the Reporter will hereafter refer, and it 

 is difficult to conceive how any one could possibly allow 

 himself to be deluded to such an extent as is here apparent. 

 It is to be hoped that these are the last of Klencke' s researches, 

 for his in every respect worthless experiments are calculated 

 ultimately to awaken mistrust in the results which have 

 been obtained by other naturalists from researches carried 

 on with the greatest conscientiousness and care. That the 

 Reporter is by no means unjust, in thus totally rejecting 

 Klencke's experiments on the contagiousness of Entozoa, 

 will be at once seen upon reference not only to his annual 

 Report (Jahresbericht iiber die Fortschritte der gesammten 

 Medizin in alien Landern, im Jahre 1844, herausg. v. 

 Canstatt uud Eisenmann, Bd. iv ; Bericht iiber Entozoen, 

 Epizoen, Ento-und Epiphyten, von Canstatt und Siebold, 



