-^90 The Philippine Journal of Science 1923 



vacancy can be seen in the layer of somatic cells opposite the 

 daughter. The slide bearing this specimen dried up before it 

 was studied closely. 



Specimen 2.— Plate 1, fig. 2. This is an asexual coenobium 

 with two daughters, each with a gonidium of 53 p. in its left 

 side and an embryo in the right side. The embryo in the left 

 daughter is 8-celled and measures 54 /*, and that in the right 

 daughter is 2-celled and measures 53 j,. On the nearer and the 

 farther sides of the mother, at the level of the lower ends of 

 the daughters, near the median plane of the picture, there is 

 a cell with the protoplast about twice the size of a somatic 

 protoplast sunken beneath the level of the somatic layer. The 

 positions of these two cells indicate that they are a posterior 

 pair of abortive gonidia. There is a similarly enlarged pro- 

 toplast in the wall of the mother over that part of the left 

 daughter midway between the reproductive bodies and the lower 

 end. This protoplast is not sunken below the level of its 

 neighbors, possibly because of interference by the daughter. 

 In the daughter at the left there are two small reproductive 

 bodies that do not show in the photograph. They are in the 

 hindmost (lower) half of the coenobium and measure about 

 12 fi wide. One is nearer the hinder pole than is the other, 

 and they are both nearly in the same plane with the larger 

 reproductive bodies. In the hinder (upper) part of the right 

 daughter there are three diminutive reproductive cells smaller 

 than those in the left daughter. This specimen and the other 

 larger ones of this series are greatly flattened and broadened 

 by the cover glass. 



Specimen 3. — Plate 1, fig. 3. This is a somewhat younger 

 asexual coenobium with two asexual daughters, each having 

 three prominent gonidia. The gonidia measure 60, 57, and 46 ^ 

 in the left daughter and 53, 53, and 42 h in the right daughter. 

 In the mother coenobium, midway between the lower ends of 

 the daughters and the hinder pole of the mother, there are 

 two abortive reproductive cells, one a little more and the other 

 a little less than twice the diameter of their neighboring somatic 

 cells below the level of which they are sunken. Between the 

 nearer abortive body and the lower end of the left daughter 

 there is a group of three somatic cells that are enlarged to 

 about one and a half times the diameter of the neighbor cells. 

 But they are not sunken. In each daughter there is, besides 

 the prominent reproductive bodies, a small one of about 11 p 

 near each of the large ones. The small body in the back 



