The Philippine Journal of Science 1923 



left, one male at the right, and one asexual at the back. The 

 bisexual daughter contains twenty-three oogonidia (female re- 

 productive cells) of 25 to 29 n in diameter and three andro- 

 gonidia (cells that produce male elements) of about 18 ft width. 

 The male offspring contains about one hundred fifteen andro- 

 gonidia that are about 12 to 15 M wide. Specimens 7, la, and lb. 



8. A male coenobium found associated with a different form of the 



species that is represented by Plate 2, fig. 13, Plate 3, fig. 14, 

 and Plate 4, figs. 21 to 26, 

 and the androgonidia are 

 Specimen 24. X 100. 



9. An asexual coenobium of the typical form. It measures 460 by 



560 n (bulging greatly on account of cover-glass pressure) and 

 contains a bisexual and an asexual daughter. The bisexual 

 daughter contains twenty-three oogonidia of 21 to 28 M diam- 

 eter and two androgonidia of 18 m diameter. The latter are 

 at the left and right sides of the daughter. The asexual daughter 

 contains two embryos, one 8-celled and one 4-celled, that were 

 formed from large gonidia, and one smaller gonidium of about 

 46 m- in diameter. Specimens 8 and 8a. X 100. 



10. A nearly mature sexual coenobium of the typical ovoid form. It 



measures 360 by 460 m and contains twelve oospores that range 

 from 39 to 43 M wide. The spore walls are smooth and about 

 3 m thick. Specimen 11. X 100. 



11. An immature bisexual coenobium of the typical ovoid form. It 



measures 320 by 405 m and contains twenty-nine oogonidia 01 

 about 30 m in diameter and two androgonidia. One of the latter, 

 in the right side of the coenobium and hidden by an oogonidium, 

 is 19 n wide. The other, at the left side above the middle, is 

 divided into an immature platelet of thirty-two cells that measure 

 26 ^ across. Specimen 10. X 100. 



12. An asexual coenobium of the typical ovoid form. In its very bulg- 

 r-glass pressure, it measures 560 by 



sexual daughters in which female 

 reproductive bodies preponderate. The left daughter contains 

 twenty-eight oogonidia of 21 to 28 n diameter, and two andro- 

 gonidia, each about 18 m wide. The right daughter contains fif- 

 teen oogonidia and two embryonic antheridia (sperm platelets or 

 bundles of sperms) that are developing from androgonidia. 

 One, at the left, is 4-celled, and the other, at the right, is 

 2-celled. The small daughter contains twenty-nine reproductive 

 bodies 18 to 21 m wide, among which no androgonidia are dis- 

 tinguishable. Specimens 9, 9a, 96, and 9c. X 100. 



13. An immature asexual coenobium of the 6-gonidiate form that is 



shown in Plate 2, fig. 8, in Plate 3, fig. 14, and in Plate 4, figs. 

 21 to 26, inclusive. It is 290 by 325 m in width and length, and 

 contains two embryos and two gonidia. The embryos have the 

 phialopores open. The gonidia are about 45 by 50 m in diameter. 

 Specimen 16. X 100. 



ing condition, due to cover-glass pressure, 



