Plate IS. 



FiQS. 1-3. Srhizopoirella dnverensis Ulrirh and Bassler, 1904. (p. 107.) 



1. .V Plioceae example, X 20, referred to this specie.s. 



2. Ancestrular partion of a zoartum, X 20, showing irregular arrangement of zooecia. 

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



3. The incrusting type of the species, X 20. 



Miocene ((Uioptank formation): Dover Bridge, Maryland. 

 Fig. 4. ScMzn [tnrella lalisinuatn Ulrieh and Bassler. 1904. (p. 9,;.) 



Photogi'aph of the original incrusting type, X 20. 



Miocene (<'hoptank formation): Jones Wharf. Maryland. 

 Figs. 5, 6. Griiii'IIip:>rrIIa asper. new species, (p. 110). 



5. The incrusliug zoarium, ■'; 20, with oriented zooecia and showing both the large and small 

 avicularia. 



Miocene iChoctawhatchee marl): Jackson Bluff, ( tcklocknee River, 2-5 miles southwest of Tal- 

 lahassee, Florida. 



6. A Pliocene example, X20. illustrating nonoriented zooecia, several of w liicli preserve the 

 ovicell. 



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

 Figs. 7-9. lEppoporiria (?) restita, new species, (p. I:i0.) 



7. View of the incrusting zoarium, X 20, with the zooecia more distinctly marked than usual. 



8. An example, X 20, showing at the base the calcareous pellicle covering the frontal and at the 

 top, monstrous zooecia. All of the zooecia have indistinct outlines. 



9. An example, X 20, preserving some ovicelled zooecia. 



Miocene (Choctawhatchee marl): Jackson lilut'f, Ocklocknee River, 2.5 miles southwest of Tal- 

 lahasse, Florida. 

 Fig. 10. Hippoponna gihbosa. new species, (p. 11)0.) 



The incrusting type specimen, X 20, showing the smooth frontal w ith its gibbosity, the shape of 

 the aperture and the widely open ovicell. 



Miocene (Duplin marl): Wilmington, North (.'arolina. 

 Fig. 11. Lepralia monUfera Ulrieh and Bassler, 1904. (p. 134.) 



Photograph of the original type, X 20. 



Miocene (St. Mary's formation): St. Marys Ri\er, Maryland. 



262 



