Journal of experimental zoology . Fig. 21 Anasa tristis; frequency distribution of head-lengths of 443 sper-matozoa from left testis of same individual as the one in figure 20. ValueinM Frequency 1 3 4 7 8 9 30 32 42 48 47 32 21 1 1 1 32 36 38, 25 14 214 CHARLES ZELENY AND E. C. FAUST. Fig. 22 Anasa tristis; frequency distribution of head-length

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Journal of experimental zoology . Fig. 21 Anasa tristis; frequency distribution of head-lengths of 443 sper-matozoa from left testis of same individual as the one in figure 20. ValueinM Frequency 1 3 4 7 8 9 30 32 42 48 47 32 21 1 1 1 32 36 38, 25 14 214 CHARLES ZELENY AND E. C. FAUST. Fig. 22 Anasa tristis; frequency distribution of head-lengths of 404 sper-matozoa from right testis. Valuein/i ^ Frequency 1 4 4 7 13 16 27 33 26 21 . 40 51 65 33 27 17 9 6 o - 1

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1904