I'l.ATK (J2. 



Figs. 1~T. I'luiiiusiiiillin linniln. new species (p. 47.'} (. 



1. TlirtH" cxMiiiples uf tlio t'roe bikiiiiolliir zoiirinm, n;itnriil size. 



2. Porlioii of :i bnuioli, X 20. witli both ovicelleil iiinl ordiiuiry zciooeia. Tlie iiumUuu 



avicularium i.s tnuisformed intu u large uiiKiiiciilate one. 

 ;{. A frugiuoiit. X 20, with tho zooivia so]i:ir;ite(l liy a salient tlir<'a(l. 



4. Tangential tbin section, X 25. The iiieili.iii a\ ieiilnriuni is sonielimes replaced by 



two iieristomial avicniaria. 



5. Interior of zooecia, X 20. The niediaii a\ ieiilariinu is replaced in pari by two 



poristouiial ones and sometimes by the large oonnna-shaped form. 

 C. View of the interior, X 30, iUnstrating the two condyles back of the apertura. 



7. I>rawing of a vertical section, X 20. 



Jliddle Jacksonian (Castle Hayne limestone) ; Wilmingten. Xorth Carolina. 

 Cat. Xo. 64].'!7. V.S.N.M. 

 Fics. S. 0. Miiirdiicllii yraiuihifni. new species (p -17.'ji. 



8. Surface of the Incrusting zoarium, X 20, showing zooecia with granular pleurocyst 

 * and obliquely directed mucro. 



9. Sketch of the apertura showing the lyrula and the two small cardelles. 

 Lower Jacksonian (Moodys marl) : Jackson. Mississiiipi. 



Cat. No. 64138. U.S.N.M. 

 Fio. 10. iliieroiicjlfi iiiitens, new .species (p. 475). 



The incrusting zoarium, X 20. Tlie zooecia are unusually wide and liave an erect 



macro and a small l.vrula. 

 Jliddle Jacksonian I Castle Hayne limestone): Wilnungton. Xorth Carolina. 

 Cat. Xo. 04139, U.S.X.II. 

 Flu. 11. lihaijiiiliustoiiicUa hrcii(Jolciifiix. v;ir. iiiiicriciiiin. new variety i p. 477 i. 



The incrusting zoarium, X 20, showing the indistiuct zooecia and the large and 



small avicniaria.. 

 Middle Jacksonian (Castle Hayne limestone) : Wilmington, Xorth Caroliii.i. 

 Cat. Xo. 64140, U.S.X.M. 

 Fig. 12. Ithii III lilt ostdiiivJht conrexn, new species (p. 47Si. 



Surface of the incrusting zoarium, X 20. The convex finely granulated frontal, the 

 asynunetrical sinus of peristomie and oral avicnl.-iriinn are characteristic features. 

 Middle Jacksonian: Kich Hill. Crawford County, Georgia. 

 Cat. Xo. 64141, U.S.X.M. 

 Fig. 13. PorclUi rinnnilnsn, new species (p. 484 i. 



The incrusting type-specimen. X 20. The frontal is granulose with transversal 



pores between the grannies. 

 Lower Jacksonian (Moodys marl) : Jackson, Mississiiipi. 

 Cat. Xo. 64142, U.S.X.M. 

 Fig. 14. Porciln lutiiijcns, new species (p. 4s7i. 



Ovicelled zooecia of the incrusting zoarium, X 20. Four rows of large poi-es form 

 the tremocyst. The median avicularium is enormous and very salient. The umbo 

 on which it is borne is frequently broken. 

 Lower Jacksonian (Moodys marl) : Jackson, Mississippi. 

 Cat. Xo. 64143, U.S.X.M. 

 Figs. 1.V17. I'uiiJhi coronata. new species (p. 485). 



15. The iucrusting zoarium, X 20, representing yoiuig zooecia separated by a prominent 



thread. 



16. A more mature zoarium, X 20. exhibiting peristomial avicniaria around apertur,-i. 



17. Anotlier portion of tlie same zoarium. X 20. with ovicelled zooecia, the ovicells 



usually being broken. 

 Lower JacIi.sonian (Moodys marl) : Jackson, Mississippi. 

 Cat. Xo. 64144, U.S.X.M. 

 Figs. 18-21. I'orelhi irrerjularh, new species (p. 484). 



18. Zooecia of the incrusting zoarium. X 20, some of them showing traces of incom- 



pletely developed ovicells. 



19. Ovicelled zooecia of a mature zoarium. X 20. 



20. Another mature zoarium. X 20. illustrating irregularity in size and arrangement of 



zooecia. 



21. Interior of zooecia, X 20. A small lyrula is visible. 

 Lower Jacksonian (Moodys marl) : Jackson, Mississippi. 



Cat. Xo. 64145, T'.S.X.M. 



03 



