Plate 23. 



I'ui. 1. Jliiicl.siiKi iiiitniiiciilinid (',■11111 ami Kassler, liilT (p. 11(1 1. 



Surface of tLe iucrustiug tyiie-spec-inien, X 2(l. 'I'wd uf tln' hiiM.'p iiitcrzddcrinl 



avicularia are present at tbe lower edge of the fiirure. 

 Middle Jacksonian (Castle Hayne liiiiestoiie) : \Viliiiiiii;toii. Xorlli Carolina. 

 Cat. Xo. 62574, T'.S.X.JI. 

 Fics. 2-."i. Hiiicksiiia costiiUfcni. new species (]/. IIO). 



2. Surface of tlie incrnstiiig zoariiiiii. X 2it. with the spines coalesced on several zooecia. 



3. A small zoarinin. X 20. 



4. Another zoarinin, X 20. in wliicli many of the zooecia have a small canal in the 



distal part of the mural rim. 

 Middle Jacksonian (Castle Hayne liinestoiioi : \Viliiiin?;toii. Xnrfli Carolina. 

 Cat. No. 6.3S82, I'.S.X.M. 



5. A variety or closely related species. X 20, with the ovicell preserved on one zooeciuin. 



Vicksburgian (" Chimney ~rock '■ division of Marianna limestone): 1 mile north of 

 Monroeville. Alabama. 

 Cat. No. U3S83, Tt.S.X.M. 

 Fuis. (j-7. Ogivalina cHiiiipora Cann ami l'.;issler, 1017 tp. llS). 



6. Surface of the incrnsting zoariuni, X 20, e.xhiliiting the general characters of the 



species. 

 Middle Jacksonian (Castle H.ayiif limestone) : Wilmington. Nortli Carolina. 

 Cat. No. (!.3SS4. I'.S.N.M. 



7. Small portion of another example, X 20. pre.serving .several endozooecial ovicells and 



the granular cryptoeyst. 

 Middle Jacksonian: Rich Hill, Crawford County, (Jeorgia. 

 Cat. No. 62875, U.S.N.M. 

 Fid. 8. Of/ifdlina cloiifiata. new species (ji. 118). 



Surface of the incrnsting type-siieeimen, X 20, showing in addition to the usual 

 features of the species, ovicelled and regenerated zooecia and some zooecia with 

 granuhir cryptoeyst. 

 Middle Jacksonian: Near Leuuds Ferry. South Carolina. 

 Cat. No. 63885, U.S.N.M. 

 Fi<;s. 0. 10. OiiivaUna clonpata iiiinoi; new variety (p. 110). 

 9. Portion of incrnsting zoariuni. X 20. 



10. Another zoarium. X 20, exhibiting more regular growth and better development of 



the cryptoeyst. 

 Middle Jacksonian: Near Lenuds Ferry. South (_"ar<iliiia. 

 Cat. No. 63886, U.S.N.M. 

 Fn-.n. 11-14. MeiiihrcndoccUnii piirifoniir Caiiu and Bassler. 11)17 (15. 123). 



11. Portion of the incrnsting zoarium, X 20, exhibiting the pyriform shape of the zooecia, 



the position of the avicularia and the very small ovicell. 



12. Another zoarium, X 20, showing broad zooecia. 



13. Zooecia, X 20, more widely separated than usual and with a convex gymuocyst. 

 Middle Jacksonian: Near Lenuds Ferry. South Carolina. 



Cat. No. 63887. U.S.N.jM. 



14. Surface of a specimen, X 20. in which the cryptoeyst is well developed, and the 



zooecia are narrow. 

 Vicksburgian (Marianna limestone) : Claiborne, Monroe County, Alabama. 

 Cat. No. 63888, U.S.N.M. 

 24 



