Plate 13. 
Figs. 1-6. Amphiblestrum constrictum Ulrich and Bassler, 1904. (p. 44.) 
1. Portion of the incrusting zoarium, X 20, showing numerous ovicelled zooecia, a giant 
zooecium, and deformed primoserial zooecia. 
2. Nonovicelled zooecia, X 20. 
3. Zoarium, X 20, exhibiting the ancestrula, calcified zooecia and regenerated zooecia. 
4. Worn zooecia, X 20, exposing the dietellae. 
Pliocene (Waccamaw marl): Waccamaw River, Horry County, South Carolina. 
5. Drawing of several zooecia of the type specimens, X 17. 
6. A portion of the type specimen, X 20, showing zooecia with nontrifoliate opesia. The lateral 
condyles are replaced by serrate denticles. 
Miocene (St. Mary’s formation): Cove Point, Maryland. 
Fig. 7. Amphiblestrum tenuiparietis, new species, (p. 45.) 
The incrusting type X 20, showing the ancestrula and surrounding zooecia, all with thin mural 
rim. 
Miocene (Choctawhatchee marl): Jackson Bluff, Ocklocknee River, 25 miles southwest of Talla¬ 
hassee, Florida. 
Figs. 8-10. Ramphonotus agellus Ulrich and Bassler, 1904. (p. 47.) 
8. The type specimen, X 20, showing the trifoliate opesium and the avicularia oriented in the 
zooecial axis. 
9. Drawing of a zooecium of the same, more enlarged. 
Miocene (St. Mary’s formation): Cove Point, Maryland. 
10. An example, X 20, containing both ovicelled and unovicelled zooecia. 
Miocene (St. Mary’s formation): Bowler’s wharf, 18 miles above Urbana, Middlesex County, 
Virginia. 
Figs. 11-13. Ramphonotus asperus, new species, (p. 46.) 
11. Specimen, X 20, showing ovicelled zooecia, unovicelled zooecia with 6 spines and worn 
zooecia exposing the dietellae. 
12. The incrusting zoarium X 20, illustrating the ancestrular region with several calcified zooecia. 
13. Another portion of the same specimen X 20, showing both ovicelled and unovicelled zooecia, 
and the dietellae. 
Miocene (Yorktown formation) Yorktown, Virginia. 
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