198 The Philippine Journal of Science "« 



weeks earlier, October 5, 1914, material that has the distinguish- 

 ing feature of embracing coenobia with six gonidia. Examples 

 of these will be given as specimens 16 to 24. From a neighboring 

 pond, J, on October 13 there was obtained material that included 

 specimens 25 and 26, which also exhibit six gonidia. The slide 

 bearing specimens 16 to 25 dried up before these coenobia were 

 studied in detail. The specimens will be separately described 

 for the purpose of bringing out points that may show better in 

 the photographic prints than in the plates. 



Specimen 1 6.— Plate 2, fig. 13. This is an asexual coenobium 

 with two embryo daughters and two gonidia. The embryos are 

 near the middle of the coenobium, one a little ahead of and the 

 other a little behind it. They have the phialopores open. The 

 gonidia are near the hindmost end of the coenobium. 



Specimen 17.— Plate 4, fig. 21. This is another asexual coeno- 

 bium in the same preparation. It contains two daughters and 

 two very young embryos in pairs. So far as can be seen the 

 reproductive bodies, gonidia, in the daughters are in number, 

 relative size, and arrangement like those of the mother. 



Specimen 1 8.— Plate 3, fig. 14. This is a specimen that was 

 photographed on the same plate with specimen 16. It is an 

 asexual coenobium with six reproductive bodies arranged in 

 pairs. Two are embryos with their phialopores still open. They 

 form a pair on opposite sides of the middle of the coenobium. 

 Each of the other pairs of reproductive bodies consists of a 

 gonidium and a few-celled embryo. One pair is a short dis- 

 tance back of the middle of the coenobium and nearly forms 

 with the pair of daughters a square. The left body of this 

 pair is the gonidium, and the right one the young embryo. The 

 third pair is near the back of the coenobium; the left mem- 

 ber is the embryo, and the right one is the gonidium. The diam- 

 eters of the gonidia are about 50 p. 



Specimen IP.— Plate 4, fig. 23. This is a nearly mature asex- 

 ual coenobium with six reproductive bodies that have propor- 

 tions and arrangement similar to those of specimen 18 (fig. 14) . 

 Two pairs of larger but unequal daughters form a square in 

 the middle, and one pair of smaller daughters is in the back 

 part of the mother behind the members of the smaller middle 

 pair. The conspicuous reproductive bodies in the daughters 

 appear to be six gonidia in each of the middle daughters and 

 four gonidia in each of the hinder pair. The gonidia of the 

 larger daughters are proportioned and arranged like the daugh- 



