Plate 153. 



FidS. 1, 2. l'ioh(jx(iiiii rliinitiniiiKixii. new species (p. (iiiT). 



1. A zoarium, X 12. .sliowiiifr the chax'acteristic cliib-slinped lir.uiclies unsynmu'lrk-ally 



arranged. 



2. One of the brandies, X 2."). Tlie peristmnes are salient hut the tulies are scarcely 



distinct. 

 Vicksl)urt;ian ( Mariaiiiia limestone): Salt Meuntaiii. ."> miles south of Jackseu, 

 Alabama. 



Cat. No. 6."i379, r.S.X.M. 

 Figs. H. 4. Dinstoiioiu iiiiitiiiiiiorii. new s|)ecies (p. (\~4). 

 S. The unilamellar, flabellate zoariuui, X 12. 



4. Portion, X 25. The large tubes and thick peristomes are evident. 



Vicksburgian (Marianna limestone) : Salt Jlountaia, ."> miles south of Tacksoii, 

 Alabama. 



Cat. Xo. G.J.3S0, I'.S.X.M. 

 Figs. 5-8. Diapcroccid ninos-a. new sjiecies (p. 74.'! i. 



5. Complete example of the mcrusting zoariuni with its bilamellar expansions. X 5. 



(i. Portion of the same specimen, X 12. (Mie of the bilaaiellar expansions, broken, is seen 

 at the upper left-hand corner. 



7. A further enlargement, X 25, illustrating the transverse wrinkles. 



8. Portion with the ovicell, X 12. The ovicell is wrinkled like the tube.s. 

 Vicksburgian : Three miles southeast of Vosburg, .Jasper County, Jli^ssissippi. 



Cat. No. 0.5381, U.S.N.JI. 

 Figs. 9-15. Didpcrocriu orhk-uhitu, new species (ii. 744). 



!t. Specimens of the free orbicular zoariuui, natural size. 

 10. Specimen with a smooth, unusual ovicell, X 12. 

 11, 12. Two fragments. X 12. showing the ovicell develcjiieil at dift'erent places on the 

 zoariuui. 



13. Zoariuui folded around an alga, X 12. 



14. Lower face of zoariuui, X 12, showing the concentric wrinkles of the basal lamelia. 



15. The tulies, X 25, showing arrangement in quincunx. 

 Vicksburgian: due mile north of JMoiiroeville, Alabama. 



Cat. No. (5.5382, U.S.X.M. 

 154 



