PLATE 12 



Fig. 1 EhamphostomeUa radiatula, characteristic appearance of zooecia witl 

 ovicells. 



Fig. 2 The same, habit sketch. 



Fig. 3 Forella propinqua. 



Fig. 4 The same, detail of fertile and infertile zooecia. 



Fig. 5 Porella acutirostris. 



Fig. 6 The same, detail of aperture. 



Fig. 7 Porella sJcenei. 



Fig. 8 The same, two views of ooecium and umbonate processes. 



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