48 J. T. PATTERSON AND LELIA T. PORTER. 



Patterson, J. T. 



'17 Studies on the Biology of Paracopidosomopsis, I. Data on the Sexes. 



BIOL. BULL., Vol. 32, pp. 291-305. 

 Wieman, H. L. 



'15 Observations on the Spermatogenesis of the Gali-fly. Dryophanta Ermace 

 (Mayr). BIOL. BULL.. Vo-. 28. pp. 3. -a? 



DESCRIPTION OF FIGURES. 



All of the figures are camera drawings made at table level, with the Zeiss 2 mm. 

 lens and No. 12 compensating ocular. The figures thus outlined were enlarged 

 three times by the aid of an enlarging camera, and then reproduced with one third 

 off. They are therefore magnified about 3857. 



PLATE I. 



FIG. i. Metaphase plate of last spermatogonial division. 



FIG. 2. Stage at the beginning of growt' period. 



FIG. 3. Stage at the mid-growth period, showing the conspicuous cytoplasmic 

 inclusions. 



FIG. 4. Spermatocyte with delicate cytoplasmic process. 



FIG. 5. Elongation of the cell in preparation for the first spermatocyte division. 



FIG. 6. Stage showing the imperfect intranuclear spindle. 



FIG. 7. Stage showing the beginning of the constriction which results in cutting 

 off the cytoplasmic bud. 



FIG. 8. A later stage showing the same process. 



FIG. 9. Stage showing the end of the first maturation division. The cytoplas- 

 mic bud has just been cut off. 



FIG. 10. Metaphase plate of the second spermatocyte. 



