22.2 Shaw: Merrillosphaera africana 199 



ters in the mother. Those of the smaller daughters are in two 

 pairs like those of specimens 16 and 17 (figs. 13 and 21) . 



Specimen 20. — Plate 4, fig. 25. This is a similar but more- 

 mature asexual coenobium. It contains a pair of larger, a 

 single intermediate, and a pair of smaller daughters. All of 

 the daughters appear to have four reproductive bodies except 

 the left smaller one, which contains five. Whether the mother 

 formed five daughters, or whether it had six, of which one had 

 been born when the material was fixed, we cannot determine. 

 In the former case it would resemble specimen 19 (fig. 23) ; in 

 the latter it would resemble its pentagonidiate daughter. 



Specimen 21. — Plate 4, fig. 24. This asexual coenobium and 

 the next represent a form that presents a very different ap- 

 pearance from that of typical Merrillosphaera africana. The 

 progeny are all practically of the same size. In these cases 

 they happen to be male coenobia, each containing many andro- 

 gonidia, or female. 



Specimen 22. — Plate 4, fig. 26. An asexual coenobium with 

 four female daughters. The daughters are so nearly of the 

 same size that the gonidia from which they developed were 

 probably nearly enough alike for the coenobium to be termed 



Specimen 23.— Plate 4, fig. 22. This is a female coenobium 

 that contains, so far as we can see by the picture, twenty-five 

 oogonidia. It measures 260 by 330 , h and the oogonidia are 

 about 27 n wide. 



Specimen 2U. —Plate 2, fig. 8. This is a male coenobium 

 with a large number of androgonidia. It is impossible to deter- 

 mine from the photograph whether or not the reproductive cells 

 had divided. The vegetative area, if any, at the front of the 

 coenobium is small. The coenobium measures about 270 by 

 350 /*, and the androgonidia are about 10 ^ wide. 



Specimen 25.— Plate 4, fig. 20. This and the next specimen 

 were taken from Pond J, on October 13, 1914. This coenobium 

 contains four daughters and one gonidium. The left of the 

 larger daughters contains a pair of larger gonidia and a small 

 one ; the right one contains a pair of larger gonidia and a pair 

 of smaller ones. Behind the right daughter there is an odd 

 daughter that contains two larger and two smaller gonidia. In 

 the back of the mother there is a small daughter containing 

 likewise two larger and two smaller gonidia. This daughter is 

 paired with a gonidium 54 /* in diameter. It may be noted 



