FLORIDAN BRYOZOA. 83 



Fig. 238; Group of young zooecia from the growing edge of another colony, showing the form of the primary 

 zooecial aperture. The enlargement of this figuve is only two thirds of the common enlargement of 

 the figures of these plates. 



» 239; The distal part of the two young zooseia, highest up at the left in the preceding figure, at the com- 

 mon enlargement. 



» 240; Discopora pertusa; group of zooecia, at two thirds of the common enlargement. 



» 241 ; Two zooecia of the same colony, at the common enlargement. 



Plate XIII: 



» 242; Retepora Beaniana, in the Floridan variety Retepora reticulata; the outlines of a part of a broken 



colony, in its natural size. 

 » 243; Part of the front side of this colony, with two ooscia and one elongated, transversely placed, free 



avicularinm. 

 » 244; Part of the back side of the same colony. 

 « 245; Retepora cellulosa, in the variety named Retepora marsapiata; the outlines of a part of a broken 



colony of the slender form, in its natural size. 

 » 246; Part of the front side of this colony, the most of the zooecia provided with ooecia. 

 » 247; Part of the back side of the same colony, at two thirds of the enlargement of the preceding figure. 

 » 248; The top of a brauch of the broader colonial form. Front side. 

 » 249; Group of young zooecia of the more slender colonial form. 

 » 250; An older part of a colony of that same form. 



» 251; The distal part of the front side of one zooecion, together with the avicularium placed thereupon. 

 » 252; Group of young zooecia from the broader colouial form. 

 » 253; An older part of a colony of the same form, without ooscia. 

 » 254; Part of a -colony of the same form, provided with ooecia. 



