4Q8 Philippine Journal of Science wi» 



observed closely packed together within the phialopore, and at 

 about 1.30 in the afternoon these same gonidia had passed for- 

 ward within their spheres and taken up positions apart from 

 one another. 



Measurements of a number of less-mature specimens were 

 made on August 4, 1914, from living material collected at Pasig 

 on that day, as follow : 



Specimen 4.-325 by 400 *. Somatic cells, 5 P (anterior 5 plus). Cells 

 in 8,100 square n near equator, 00 to 52. Number of somatic cells, about 

 2,425. Gonidia, 6: 55, 45, 62, 64, 60, and 70 ft. 



Specimen 5.— 270 by 320 p. Somatic cells, about 5 ,". Cells in 8,100 

 square m near equator, 72. Number of somatic cells, about 2,280. Gonidia 

 6; 40, 42, 50, 57, 50, and 56 * 



Specimen 6. — 370 by 450 m. Somatic cells near equator, about 5 M. 

 Cells in 8,100 square m, 39. Number of somatic cells, about 2,370.. Gonidia, 

 6; 50, 58, 65 by 73, 58 by 66, 64 by 80, and 64 by 75 *{ some about to 

 divide. 



Specimen 7. — 255 by 300 m. Somatic cells near equator, about 4.5 to 5 

 /*. Cells in 8,100 square m, 84. Number of somatic cells, about 2,370. 

 Gonidia 6; 36, 40, 43, 43, 46, and 56 ft. 



Specimen 8. — 380 by 460 (i. Contained about 27 oospores or oospheres 

 evenly distributed in the posterior three-quarters of the coenobium. Oo- 

 spheres, 28 to 30 fi in diameter. 



Specimen 9. — Presented the anterior pole and measured 320 v- in diam- 

 eter. The four cells about the anterior pole were observed to form a 

 diamond with transverse diameter about equal to each of its four sides. 

 The anterior pole may be identified by the radially symmetrical arrange- 

 ment of the stigmata about it. Gonidia, 5; 55 to 60 m; dividing or about 

 to divide. 



STAGES AND FORMS IN COTYPE MATERIAL 



The cotype material of this species consists of specimens 

 mounted (1) on the same slide, (2) on other slides from the 

 same batch of stained material, (3) on other lots of slides from 

 the same fixation, (4) material from the same collection, (5) 

 material from the same pond at near the same date, and (6) 

 material taken from near neighboring ponds on the same and 

 near dates. On the same slide with the type specimen are nine 

 hundred eighteen other specimens which appear to be of the 

 same species, and one specimen of a Volvox species. There are 

 six other slides of the same lot. A sister lot of seven slides 

 differs in having been stained only with Bismarck brown, the 

 treatment with alcoholic nigrosin solution having been omitted. 

 The following data descriptive of specimens 10 to 18, inclusive, 

 are from the slide bearing the type specimen : 



To show the maximum number of gonidia and embryos, 

 namely, 8, and also to show the appearance of the embryos after 



