Plate 22. 



Fkih, 1-G. Leiosella eda.r, new species, (p. 142.) 



1. Fragments of the free unilamellar zoarium, natural size. 



2. A tubular zoarium, X 20, with the zooecia exhibiting the large rimule spiramen. 



3. Ovicelled zooecia, X 20. 



4. Zooecia, X 20, in which the small frontal avicularia are replaceil by a large avicularium with 

 spatulate mandibles. 



5. A tubular zoarium, X 20, showing zooecia provided with an irregular rinuile spiramen and 

 with small avicularia. 



(>. Interior of zooecia, X 20, showing the apertura and the peristomial avicularium. 

 Lower Miocene (Phipola marli: Chipola River, Calhoun County, Flori<la. 

 FiG.s. 7-14. Smittina trispinosa Johnston, bs3S. (p. 143.) 



7. Unovicelled zooecia of a well preserved zoarium, X 20, with the avicularium small or absent 



8. Ancestrula and surrounding zooecia of the same zoarium, X 20. 

 Pliocene (Waceamaw marl): Waccamaw River, Horry County, South Carolina. 



9. Ancestrula region of a Miocene example, X 20. 

 Miocene (Duplin marl): Wilmington, North Carolina. 



10. An abratled surface, X 20, showing the alternate arrangement of the zooecia between two 

 rectilinear axes without septulae. 



11. An ovicelled zoarium, X 20, in which the ovicells are broken. The alternate arrangement 

 of the zooecia is visible. 



12. Zooecia, X 20, with salient avicularia. 



13. Zooecia, X 20, in which the peristome is formed by two lateral salient lips. 



14. Zooecia, X 20, with well-preserved ovicells. 



Pliocene (Caloosahatchee marl): Shell Creek, De Soto County, Florida. 

 266 



