Plate 20. 
Figs. 1-6. Microporella ciliata Linnaeus, 1759. (See also pi. 36, figs. 4, 5.) (p. 119.) 
1. Incrusting portion of zoarium, X20, showing the typical zooecia. 
2. Bilamellar expansion of the same zoarium, X 20. The zooecia have large tremopores and no 
granules. 
Miocene: Kuhns, Carteret County, North Carolina. 
3. Typical zooecia, X 20, with their frontal provided with granules and small tremopores. 
Miocene (Choctawhatchee marl)! Jackson Bluff, Ocklocknee River, 25 miles southwest of Talla¬ 
hassee, Florida. 
4. The original type specimen of Microporella praeciliata Ulrich and Bassler, 1904, X 28, hither¬ 
to distinguished on account of its large tremopores. 
5. Several zooecia of the same, further enlarged. 
Miocene (Choptank formation): Jones Wharf, Maryland. 
6. The type specimen of Microporella in/lata Ulrich and Bassler, 1904, now considered a synonym 
of M. ciliata. 
Miocene (Choptank formation): Jones Wharf, Maryland. 
Figs. 7-11. Microporella bifoliata Ulrich and Bassler, 1904. (p. 121.) 
7. Photograph of the bifoliate type specimen, X 20, with both ovicelled and unovicelled zooecia . 
8. A drawing of two ovicelled zooecia. 
9. A zooecium and an avicularium highly magnified. 
10. Mature unovicelled zooecia, X 20. 
11. Unovicelled zooecia, X 20, illustrating appearance in young specimen. 
Miocene (Choptank formation): Cordova, Maryland. 
Figs. 12, 13. Cyclocolposa (?) spinifera new species, (p. 136.) 
12. The incrusting zoarium, X 20, with ancestrular zooecia. The pleurocyst is incompletely 
developed. 
13. A zoarium with mature zooecia, X 20, showing the very thick frontal and the globular smooth 
ovicell. 
Miocene (Yorktown formation): 1 mile west of Fort Nonsense, Gloucester County, Virginia. 
Figs. 14, 15. Microporella hexagona, new species, (p. 120.) 
14. The incrusting zoarium, X 20, showing the strongly calcified hexagonal zooecia. 
15. Another portion of the same specimen, X 20, illustrating the hexagonal shape of the zooecia, 
the large ascopore with its salient peristome and the triangular avicularia. 
Miocene (Duplin marl): Darlington Courthouse, South Carolina. 
Fig. 16. Lalcaria grandis, new species, (p. 97.) 
The incrusting zoarium, X 20. 
Miocene (Yorktown formation): Yorktown, Virginia. 
264 
