Plate 14. 



Fic. 1. ViiUiiiiiiru cuvulUitii, new s|)ec-u-s ( ji. ITio). 



Tlie Incnisting type-specimen. X 20. exhibiting the hyperstumial uvii-ell willi a 



triangular area and the acuminate avicularia. 

 Lower Jacksonian : 31 miles southeast of Shell BUilT post oliice, Georgia. 

 Cat. No. 63S40, U.S.N.M. 

 Figs. 2—4. ^chizcmielhi clail)oniira Canu and Bassler. 1917 (p. 440). 



2. Surface of the bilamellar zoarium, X 20. The wide riuiule of the apcrtuni, the 



hyperstoniial ovicell (broken), and tlie avicularium within the peristoniie are 

 illustrated. 



3. Another fragment, X 20, exhibiting several zooecia with broken ovifplls. At the 



top the interior of the zooecia with the tremocystal pores is visible. 



4. Sketch of the apertura, much enlarged, to show the wide rimule. 

 Claiboruiau (Gosport .sand) : Claiborne. Alabama. 



Cat. Xo. (i259.">. U.S.X.M. 

 Figs. 5-15. ilrtradoliinii sulcifmiiii. new species (p. 4i7). 



5. Four fragments of the free, bilamellar. narrow zoarium, natural size, 



6. A young frond, X 20, showing the lateral zooecia only are provided with avicularia, 



A few of the zooecia are limited by a thread-like elevation. 



7. A more developed zoarium, X 20. The large avicularia are restricted to the lateral 



zooecia. 



8. An example with normal zooecia, X 20. exhibiting l.-irge and small avicularia. 



9. Another stage of growth, X 20, with the avicularia less conspicuous, 



10-11. Views of two old zoaria, X 20. in which most of the avicularia are obscured by 

 the tubules. 



12. A young branch, X 20. The large avicularium is developed only on the latei-al 



zooecia. 



13. Interior of the zooecia, X 20. A lyrula-like process is visible on the proximal Ixmler 



of the apertura. 



14. Schematic drawing of a longitudinal section, X 20. ap. apertura; pic, peristomice; 



til. tubule; x. zooecium. 



15. Tangential thin section. X 20, showing the appearance of the sulci. 

 Lower Jacksonian (Moodys marl) : Jack,son, Mississippi. 



Cat. No. 638.50, U.S.N.M. 

 Fig. 16. Chcilnpoia orMfera, new species (p. .526). 



The unilamellar zoarium, X 20. The lateral aviculariinn and the pores of the 



tremocyst surrounded by a collar are distinctive. 

 Claibornian (Gosport sand) : Bluff on Tombigbee River, Gopher Hill, Alabama. 

 Cat. No. 63851, U.S.N.it. 

 Fig. 17. PuixUa (Miqiin. uew species (p. 481). 



The incrustiug type-specimen, X 20. The median avicularium is oblique while the 



frontal is often obscured by two adventitious avicularia. 

 Lower Jacksonian : 3i miles southeast oC Shell Bluff post oflice, Georgia. 

 Cat. No. 638.52. U.S.N.M. 

 Figs. 18, 19. Periga.i1reUa nnxiita, new species (p. 576). 



IS. View of the incrustiug zoarium, X 20, exhibiting ovicells (broken) and avicularia on 



the peristome. 

 19. Zooecia, X 20, The detachable pleurocyst and the oloeyst with widely .spaced 

 areolae are shown. 

 Claibornian (Gosport sand) : 1 mile southwest of Rockville. Clarke County. Alabama. 



Cat. No. 63853, U. S. N. M. 



15 



