I'l.ATK 1. 



(Kigures 1-1, i;. 7. 11. lii. 17. is. ii. 23. 2r,-2.s are after rirk-li. liMi].) 



Fids. 1. 2. Mciiil>niiiii)Oiiii(i r'liinihitn firitli, Ifml (p. 04). 



1. Surfiit-e of the iiii-rustiiii; Z(i.-\i'iniii, X 20. of tin- v;irii-t.v witli siiimH zoocci.-i. 



2. Tlic t.viie-spt'ciineii, X 2(1. Severn] cnlcitled zooocin nre iiresent. 



I.irwfst Koeene (Rr.VdZd.-in lieil :it linsp of Aqni;i formation i : Upper Marnii>ro, Mary- 

 land. 

 FiG.s. 3-5. Ellisiiia spk-iihixd Tlricli. I'.KH i p. 127 i. 



3. 8nrface of tlie ini-rnstin;,' t.vpc-spcrinien, X 2<i, illnsirarin;.' arrangement of zooecia 



and ovieells. 



4. Several zooeein of the same, X 30. 



5. riioto^irapli of tlie t.vpe X 2(i, showinj: a\icularia. 



Lowest Eocene (Rryozoan lied at base of Aijuia formation i : Ti)per Marllioro, Mary- 

 l.-md. 

 Fuis. C-lo. Kllixiiia anflui't" t'lrivli. I'.Mil (p. 1271. 



0. Sketch of the incrnstini: zoarlum. X 25, with ovieells present. 

 7. .Several zooecia of another worn example, X 2."i, withont ovieells. 

 S. Portion of a zoarinm, X 20, ilUistrating occurrence of the septulae. 

 9. Another ])art of the same, X 20, with several broken ovieells. 



10. Abraded surface, X 20, showin;; a large distal and a pair of lateral dietellae. 

 Lowest Eocene (Brvozoan lied at base of Aquia formation) : T'pper Marlboro. Mary- 

 land. 



Cat. No. 6377.5, U.S.X.M. 

 Fws. 11-13. AiiiiiliiJ}li\'<trtnii hetcrojiora (;.-ilili and Horn. l.Sfi2 (p. 158). 



11. Surface of the Eocene form of the sjieeies, X 20. 



12. A zooecium of the same, X .30. 



13. Photofiraph of the Eocene tyiie, X 20. 



Ixiwest Eocene (Brvozoan bed at base of Aquia formation i : Upper Marllioro, Mai'y- 

 l.and. 

 Fill. 14. RiiiiiiiliiDiotiis liirrix. new species (ji. If4). 



The incrusting zoarinm. X 20, exhibiting ordinary, ovicelled, and calcified zooecia. 

 Lowest Eocene (Br.vozoan lied at liase of A(piia formation) : Upper Marlboro, Mary- 

 land. 



Cat. No. (S77t!, I'.S.X.M. 

 I'lii. 1.5. Staiitcnorellii ciiliiiiiricii. new siiecies (p. 1681. 



The free cylindrical type-siiecimen, X 20. Two zooecia at the top are ealcitied. 

 Lowest Eocene I Krvozoan bed at base of Aquia formation) : Upiier Marlboro, Mary- 

 land. 



Cat. No. 63777, U.S.N.M. 

 Fig. 16. EiirHiiia torta Gabb .and Horn. l.Mi2 (ii. 2.57). 



An Eocene e.\ample of this liilamellate species. X 20. 



Lowest Eocene i Kryozo.-in lied at base of Aquia formation) : Upper Marlboro, Mary- 

 land. 



Cat. No. 63778. U.S.N.M. 

 Figs. 17-19. LuiiiilniUi nrerna Ulrieh, 1001 (p. 2401. 



17. The eelluliferous side of the type-specimen, X 25. 

 IS. Inner side of the same example, X 20. 



Lowest Eocene ( Hryozoan lied at base of Aquia foiniitionl : Two miles below r<itomac 

 Creek, Maryland. 



19. Photograph, X 20. 



Ixiwest Eocene ( P>i'vozoan bed at base of Aquia formation) : Upper Marlboro, Mary- 

 land. 



Cat. No. 63770, U.S.N.M. 

 Figs. 20-21. MuerniKira nqn'm. new species (p. 2771. 



20. The incrusting zoarinm, X 20. showing ancestrular region. 



21. The ordinary zooecia. X 20. illustrating their hexagonal form. The lateral indenta- 



tions of the aperture are visible. 

 Lowest Eocene (Itryozoan bed at base of Aquia formation) : Upper Marlboro, Mary- 

 land. 



Cat. No. 63780, U.S.N.M. 

 Figs. 22-25. Mrtiihraniiiorelln wodvsta Ulrieh. 1901 (p. 2S5). 



22. The incrusting type-s]ieeiinen, X 20, with several ovicelled zooecia. 



23. An oi'dinary zooecium of the same, X .30. 



34, 25. Two iiliotographs of another specimen. X 20. The costules often show .i lumen line. 

 Lowest Eocene tBr.Vfizoan bed at base of Aquia formation) : T'pjicr Marlboi'o, Mary- 

 laud. 



Cat. No. 637S1. TT.S.N.JL 

 Fi(i. 26. MciiiTiriiiiiixireUa crii.ssiihi Ulrieh. Hiol (p. 2s5i. 

 The incrusting tyiie-siiecimen, X 20, 



Lowest Eocene ( Bi-vozoan bed at base of A(piia form.ition) : Upper Marllioro, Mary- 

 land. 

 Figs. 27-31. BiitlKi-sclUi tiyiicni Ulrieh. lliol (p. 405). 



27, 2S. Surf.Mce of the tyiie-specimen. X 20. and a few zooecia of another example. 

 29. Photograph of another sTieeimen, X 20, showing one aspect of the species. 

 .30. Zoo(K-i;i. X 20, witli the ovicell preserved on sever;il of them. 

 .31. An exanqile. X 2o, with the avicul.-iria and mu'ro well developed. 



Lowest Eocene l P.i-vozo.-in bed ;it liase of .\quia formation i : Upper .Marlborn ;\Iary- 

 laiid. 



Cat. No. (j37.S2, U.S.N.M. 

 o 



