ART. 22. CYCLOSTOMATOUS BRYOZOA — CANU AND BASSLER. 141 



Fig. 12. Plagioecia varians Ulrich, 1901 page 26. 



An ovicelled zoarium, X 12, consisting of a single subcoloney. 



Cretaceous (Vincentown marl) : Vincentown, New Jersey. 

 Figs. 13-15. Plagioecia americana Ulrich and Bassler, 1907 page 27. 



13. An ovicelled example, X 12, in which the ovicell is short and shows the 



oeciostome clearly turned toward the base. 



14. Another ovicelled example, X 12, exhibiting longer tubes near the zoarial 



margin. 



15. A zoarium, X 12, preiDerving the ancestrular region where the tubes are 



shorter than usual. 

 Cretaceous (Vincentown marl) : Vincentown, New Jersey. 



Plate 4. 



Figs. 1, 2. Trigonoecia transversa, new species page 19. 



An ovicelled zoarium, X 6, and portion, X 12, showing two ovicella 



(one broken) and the small oeciostome. 

 Jurassic (Bathonian) : Shipton Gorge, Dorset, England. 



Fig. 3. Cardioecia neocomiensis D'Orbigny, 1852 page 19. 



Portion of a frond, X 12, with two ovicells. The cordiform shape of 



the ovicell and the small oeciostome are visible. 

 Lower Cretaceous (Valangian) : Sainte Croix (Vaud), Switzerland. 



Fig. 4. Mecynoecia gracilis, new species page 12. 



The type specimen, X 12, a free unilamellar zoarium with the charac- 

 teristic ovicell. 

 Jurassic (Bathonian) : Shipton Gorge, Dorset, England. 



Fig. 5. Trigonoecia verrucosa Milne Edwards, 1838 page 18. 



Portion of the encrusting zoarium, X 12, bearing an ovicell. 

 Jurassic (Bathonian) : Shipton Gorge. Dorset, England. 



Fig. 6. Nematifera reticulata D'Orbigny, 1853 page 20. 



Portion of a branch, X 12, exhibiting the characteristic salient threads 



outlining the zooecia. 

 Lower Cretaceous (Valangian) : Sainte Croix (Vaud), Switzerland. 



Fig. 7. Atractosoecia edicardsi Cann, 1913 page 10. 



Ovicelled portion of the incrusting zoarium, X 12, introduced for com- 

 parison with the following new species. 

 Jurassic (Bathonian) : Ranville (Calvados), France. 



Fig. 8. Atractosoecia ucalfordiana, new species page 10. 



Portion of the incrusting type specimen, X 12, exhibiting three ovicells. 

 Jurassic (Bathonian) : Shipton Gorge, Dorset, England. 



Plate 5. 



Figs. 1. 2. Plagioecia compressa Goldfuss, 1827 page 28. 



1. View of a variety with small apertures exhibiting an ovicell resulting 



from the fusion of two secondary ovicells, X 12. 



2. The ovicell of the normal form of the species, X 12. 

 Cretaceous (Coniacian), Tours (Indre-et-Loire), France. 



Figs. 3, 4. Notoplagioecia magnipora, new species page 30. 



Two ovicelled branches, X 12, each preserving the small oecio- 

 stome. 

 Cretaceous (Coniacian), Tours (Indre-et-Loire), France. 



Fig. 5. Notoplagioecia flexuosa D'Orbigny, 1853 page SI. 



An ovicelled zoarium, X 12. 



Cretaceous (Coniacian) Tours (Indre-et-Loire), France. 



