I'l.AlE .".2. 



Fig. 1. A(Uii tnni'iitu I..-iiislMii'niii;li. isr,!.' (p. 180). 



'I'lif KiirciLc siK'i-inicii riiiii|i:iri'<l witli (his rocent species. X 20. 



Jliilillc .TMi'l;soiiiMii K'.-isiJc Hiiyiio liinestonel : AViliiiiiigtoii, North Ciimliiin. 

 Cat. No. (;.",'.)4T, T.S.iX.JI. 

 Figs. 2, .3. Actcn iiuini'nui I,iinic:ms (p. 170). 



2. The creeping portion of the zooecin, X 20. 



Upper Jacksonian (Ocnla limestone) : liainbridge, (!eors;ia. 

 Cat. No. 6.394S. U.S.N.M. 



3. Another example. X 20. 



Upper Jacksoniaiv (Ocala limestone) : Oeala, I'lcirida. 

 Cat. No. 00049. U.S.N.M. 

 Figs. 4-7. SriiiiiufcJhiria cJliiitictf Iteuss, 18G9 (p. 184). 



4. Frontal view of .-in almost complete segment. X 2.i. 



5. Dorsal side of another ex.amiile, X 25, exhihitini; the ildrsal viliracnl:i. 

 Jlidille J;ieksonian (Castle llayne limestone). Wilmini;ton, North Carolina. 



Cat. No. 63050. U.S.N.M. 

 6, 7. Frontal and dorsal sides of two fragments, X 25. On the dorsal a radicular pore is 

 shown in addition to the vihracnlum. 

 Jliddle .Tacksonian: Ne.-ir I.enuds Ferr.v, South C.-irolina. 

 Cat. No. 03051. U.S.N.M. 

 Figs. S, 9. Scriiii'icclldrki tirnciUx It'puss, 1869 (p. 185). 



S. Portion of a segment, X 25, with zooecia .'it its hasi' that have undergone total 



regener.-ition. 

 0. Dorsal side of another segment, X 25. The vibraculum is directed longitudinally. 

 Jliddle .Tacksonian : Near Lenuds Ferr.v, South Carolina. 

 Cat. No. 6.3052, U.S.N.M. 

 Figs. 10-14. HcrniiiircVaria dubia, new species (p. 100). 



10,12. Frontal side of three segments. X 25. The zooecia seem to be regener.-ited. 

 13. 14. Dorsal side of two segments, X 25. 



Middle .Tacksonian: Neai- Lenuds I^erry, South C.-irolina. 

 Cat. No. 63953, U.S.N.M. 

 Figs. 15-19. Xcllin hifnciaia, new species (p. 107). 



15,16. Two iucomiilete segments, X 23. showing ordinary zooecia changed into radicular ones. 

 Middle .Tacksonian: Near Lenuds Ferry, South Carolina. 

 Cat. No. G3954, U.S.N.M. 

 17,18,19. Three fragmentiir.v segments, X 25. In figure 17 the liroad zooecia of the zoarium 

 are shown, while the narrow zooecia ai'e illustrated in figure 18. 

 Mcksliurgian (Bvram marl) : Byram, Mississippi. 

 Cat. No. 6305.5, U.S.N.M. 

 Figs. 20-21. XcUia ronrntciuitfi Canu. 10O7 (p. 107). 



20,21. Two examples, X 25, of this large celled siiecies. 



Middle .Tacksonian: One-half mile southeast of Georgia ICaolin Co. Mine, Twiggs 

 County, Georgia. 



Cat. No. 63056, U.S.N.M. 

 Figs. 22-24. GemcUnria prhiia Reuss, 1806 (p. 200). 



Front, side and dorsal view, X 25. of this uniiiue specie.s. 

 Jacksonian (Zeuglodon zone) : ("ocoa post otlice, Choctaw County, .\l:iliamn. 

 Cat. No. 63957. U.S.N.M. 

 Fig. 25. Ont/cliocrlhi rrlxa. new species (p. 207). 



The incrusting tyiie-specimen, X 20, showing the elongated opesium. 

 Lower .Tacksonian (Moodys marl) : Jackson, Mississippi. 

 Cat. No. 63958. U.S.N.M. 

 Figs. 26. 27. Oni/rJidCclla Uiciniosa. new species (p. 2071. 



26. The incrusting zoarium, X 20, illustrating differences in size between marginal and 



ordinary zooecia and onychocellaria. 

 Middle Jacksonian: Near TyOnuds Ferry, South Carolina. 

 Cat. No. 63959, U.S.N.M. 



27. Ordinniw zooecia and onychocellaria, X 20, showing the opesiular indentations. 

 Middle .Tacksonian (Castle Hayne limestone) : Wilmington, North Carolina. 



C;it. No. aSOOO. T'.S.N.M. 

 Figs. 28-30. OtiuchorelUi (liiiilicitrr. new species (p. 208). 



28. The incrusting zoarium, X 20. illustrating zooecia of similar size but with large and 



small sized opesin. 

 .Middle Jacksonian: Eutaw Springs, South Carolina. 

 Cat. No. 6.3061, U.S.N.M. 



29. Anotlier zonrium. X 20, showing the duplex character of the opesia very well. 

 Jliddle Jacksonian : Rich TTill, Crawford County, Georgia. 



Cnt. No. 63962. U.S.N.M. 

 ,30. Zooecia. X 20, with opesiular indentation better developed than usual. 



T'jiper J;icksonian (Ocala limestone) : West bank of Sepulga ISiver, Escambia Cennty, 

 .Vl.aliama. 



Cat. No. 6.3903. U.S.N.M. 

 Figs. 31, .32. OiuirJiocrUa (nii/iiloxn Reuss. 1847 (p. 205). 



31. Incru.sting zoarium. X 20, of this widespread species. 



32. View of the interior of the frontal. X 20. The op(»sium of the on.vchocellarium has 



a small proximal sinus. 

 Jliddle Jacksonian (Castle Hayne limestone) : Wilmington. North Carolina. 

 Cat. No. 63964, U.S.N.JL 



55899— 20— Bull. 106 5 33 



