NEW MYXOPHYCEAE FKOM PORTO RICO 



21 



Anacystis distans sp. nov. 

 Plate 4, figure 37 



Colonics 20-35 |j diam., spherical, of gelatinous consistency, 

 free ; cells spherical, about 2 p diani., very pale aeruginous, 16- 

 32, rarely 64, in a colony, considerably separated from each 

 other, usually 2-3 times their diameter ; resting spores unknown ; 

 sheath homogeneous throughout the colony, ample, somewhat 

 gelatinous. 



Growing among other species of ]\Iyxophyceae on a water 

 pipe by a flume near Maricao, no. 1155 e, type; and 1148 h; on 

 limestone between Arecibo and Utuado, no. 1465 a. 



From the descriptions and figures of Gloeocapsa punctata 

 Naeg., Anacystis distans is very closely related to it, but the col- 

 onies are larger and have more cells, which are more nearly of 

 uniform size. From all appearances G. punctata Naeg. is a true 

 Anacystis, going through the same life cycle as the one described 

 for this genus under Anacystis yigas in this paper. 



Anacystis magnifica sp. nov. 



Plate 4, figure 38 



Colonies spherical to subspherical, free, 80-125 \x (up to 

 175 n) diam.; cells angular, irregular in shape and size, 11-15 n 

 diam., bright aeruginous, not densely crowded together, coarsely 

 granular; resting spores 18-22 p (up to 30 m) diam., of the same 

 shape as the cells, with a thick, hyaline Avail closely beset with 

 hyaline spines about 6 \x long, teguments firm, homogeneous 

 throughout the colony, hyaline, 7-12 \\ thick outside of the colony 

 of cells. 



Growing in association with other Myxophyceae, on a wall in 

 Fort San Cristobal, San Juan, no. 2016 a, type; on a water pipe 

 near a stream at Maricao, no. 1148 c. 



Anacystis magnifica is one member of the group of the genus 

 in which the resting spores are much larger than the vegetative 

 cells from which they arise, and it has more or less highly ornate 

 spore Avails. The Avhite spines remain on as remnants until the 

 new colony arising from the resting cells has attained almost 

 half the mature size, but they disappear A^ery gradually. At ma- 

 turity no trace of them is to be seen on the limiting membrane. 



