NEW MYXOPHYCEAE FROM PORTO RICO 



23 



ferentiat(Ml from the colonial tegument, 2-4 cells at times re- 

 maining in the special tegument i'or some time before its fusion 

 with the general tegument, pale aeruginous, 2-2.4 n diam. ; rest- 

 ing spores only slightly changed vegetative cells ; tegument firm 

 and smooth on the surface, rather close-litting, coral red, lamel- 

 lose throughout the colony, the special teguments usually colored 

 brighter than the colonial tegument. 



Growing in association with other species of Myxophyceae 

 on rocks by Laguna Joyuda, Mayagiiez, no. 1304, type. 



This species of Anacystis seems closely related to Gloeocapsa 

 rosea Kuetz., judging from Kuetzing's original description. 

 The description is, however, incomplete regarding the life his- 

 tory, and no specimens are available for comparison. 



Anacystis nidulans sp. nov. 

 Plate 4, figure 42 



Colonies spherical, 25-40 \i diam., free ; cells usually 16-32 

 in a colony, but up to 64, subspherical to irregularly angular, 

 3.5-4.5 M diam. in the juvenile stages, larger at maturity, pale 

 aeruginous, homogeneous ; resting spores 7.5-9 \x diam., of the 

 same shape as the vegetative cells, with a thin, membranaceous, 

 smooth, coral-red wall, obscuring- the contents, densely crowded 

 together within the mother utricle; sheath close-fitting, sub- 

 membranaceous, and coral-red on th^ surface, pale pinkish in 

 the interior. 



Growing on bark near Laguna Joyuda, Mayagiiez, no. 1207 a, 

 type. 



Anacystis pulchra sp. nov. 



Plate 4, figure 43 



Colonies spherical, 45-70 \x (up to 150 \x) diam., free, contain- 

 ing 32-64 (up to 128) cells, not forming a stratum; cells not 

 congested in the colony, spherical to very irregular in outline, 

 7.5-10 \x diam., aeruginous, homogeneous, remaining in sheaths 

 for some time, forming groups of 4-16 before the teguments 

 become homogeneous ; resting spores of the same shape as the 

 cells, 11-14 |j diam., with a dense, thin, coral-red Avail, smooth 

 or very finely granular ; tegument firm, smooth and rigid on the 

 surface, more or less lamellose, coral-red, or pink, deeper color 

 on the surface and on the separate tegument, paler in the gen- 

 eral mass. 



