1014 rEOCEEDINGS OF THE THIRD ENTOMOLOGICAL MEETING 



flagella of my first aeries, but Leidy was not riglit fi'oin the point of 

 view of their mobility. The second series of Leidy comes " from a 

 circle behind the former, extend backward and outerward and wave 

 like those of the first rank." They are the flagella of my miylice. The 

 third series of Leidy starts from the head beneath the former, and spreads 

 over the body to its posterior extremity or beyond it to an extent pro- 

 portionate with the shortening of the animal. Leidy's fourth series, 

 " the longest of all the series springing from the head, fold backward 

 in a special direction, clearly envelop the body and extend beyond its 

 extremity in a twisted fasciculus with divergent ends." 



The mistakes of Leidy have been copied in the various text-books 

 of Protozoology. As you see, the figure given in Ray Lankester's 

 book (Plate 168, figure 17), for example, is a reproduction from the 

 figure 10 of Leidy's original paper (Plate 168, figure 16). 



The figm-e 18 of my Plate 168 represents the Trichoni/mpha of Clrassi's 

 description. He has well described the hourglass-like formation and 

 the mushroom-like head, but believes that the first is like the neck of 

 a bottle, whose very large but not very distinct base, would be situated 

 in the body of TricJionjjnipha. constituting the line of separation of his 

 so-called striate and non-striate zones. This base would harbour the 

 nucleus of Trichonympha surrounded by some rodlets, forming his 

 cestello. I have never seen this cesfello. and it is not true that the Jiour- 

 glass-like formation has any connection 'with the body endoplasm, 

 unless by its articulation. Finally for Grassi all the flagella, short and 

 long, come from the anterior striated zone, wliich is evidently a mistake. 



The description of C. Franca is very much like mine. I must however, 

 note the following two points : (1) the distinction that Franca establishes 

 in the body protoplasm in prenudear and postnuclear segments, with a 

 granular structure in the first and alveolar in the second, I never found 

 in my specimens. Moreover, it can be easily seen that this distinction 

 cannot take place because the position of the nucleus is very variable. 

 Fran^a's series of flagella are tlu-ee, but the first comes from the line of 

 conjunction of the two fir.st segments, the second (my surplice) from 

 the borders of the second segment and the third from the anterior part 

 of the third segment. These are the longest for him and envelop the 

 whole body. I think .that the mistakes are mostly due to the study 

 of these parasites in dry stained preparations. Studying the slides of 

 Mi. Bainbrigge Fletcher I have seen that the flagella of the third series 

 seem to be the longest. My researches have been done in hanging 

 drops and vital coloration. I have examined thousands of Tr. agilis 

 and you may safely believe my description. By this I have found out 



