Journal of experimental zoology . Fig. 28 Trirhabda tomentosa; frequency distribution of head-lengths of 481spermatozoa from a single testis. Valuein,! Frequency 3 13 14 35 36 47 48 47 43 46 47 37 22 11 15 10 3 2 2 giving a ratio of : Set B, figure 30; 507 sper-matozoa from the same left testis as figure 29. The distribu-tion is bimodal with modes at and giving a ratio : {d) Conclusion. The two series of measurements do not agreeclosely,
Journal of experimental zoology . Fig. 28 Trirhabda tomentosa; frequency distribution of head-lengths of 481spermatozoa from a single testis. Valuein,! Frequency 3 13 14 35 36 47 48 47 43 46 47 37 22 11 15 10 3 2 2 giving a ratio of : Set B, figure 30; 507 sper-matozoa from the same left testis as figure 29. The distribu-tion is bimodal with modes at and giving a ratio : {d) Conclusion. The two series of measurements do not agreeclosely, but both show distinctly that the population is not auniform one and that two principal groups are involved. SIZE DIMORPHISM IN SPERMATOZOA 221. Fig. 29 Phytonomus punctatus; frequency distribution of head-lengths of506 spermatozoa from left testis. ValueinM Frequency 2 3 1 5 5 11 16 28 33 41 33 0 55 63 42 77 51 42 22 8 1
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1904
