54 pnnr'EEDTNns or the xatioxal }rr^ET\v. vou xxx. 



mined ))y the liorizoii in which it occui'.s, Natuially when several 

 species of KHrliurojxH'a occur at the same hori;5on, the determination 

 of their respective basal sockets l)econies very difficult if not impos- 

 sible unless the pointed zoarium and parasitic base are still in position. 

 There ca>i l)e little 'loubt that SagciK-lId d>'i((ta is the articulating" basal 

 expansion of Kscharopo7'a acuminatd (James), since the latter is the 

 only species of Excharopora known in the same beds of the F^den shale. 

 Depending upon James's statement" that his specimens were col- 

 lected "at the horizon of the hilltops at Cincinnati,'' Nickles and the 

 writer, in the cross references in their Synopsis of American Fossil 

 Bryozoa, referred >Sagenella striata to the Fairview species Esc/iaro- 

 p(>rafalcifo7'mls. However, this reference andremarks concerning the 

 organism were inadvertently omitted under the synonymy of the latter. 

 The articulating bases of E. fatclfonnls were described b}' I'lrich 

 under the names Craterlpora lineata and var. expamta^ before their 

 true relations, as published by him in LSSS,*^ were ascertained. 



STICTOPORELLA FLEXUOSA James. 



Ptilodiciyajtexuoxd J AMES, raleontolojjist, No. 1, 1878, p. 4. 

 StictoporelldfexiioxdVhiucn, Jour. ■Cincinnati Soc Nat. Hist., V, 1882, p. 169. 

 Sfictoporella interMhicta T'lhich, Jour. Cincinnati 8oc. Nat. Hist., V, 1882, p. Ifi9, 



pi. vni, figs. 9, 9a. 

 Stictopiirdla udemt'nicUt Ulrich, (ieol. Surv. Illinois, VIII, 1890, )>. .S94, fijr. \A<t,h. 



For the identitication of this species the student is referred to the 

 description and figures of the external characters given 1)V Ulrich in 

 1882, and the iigures of the internal features published ])y the same 

 author in 1890. Ulrich described the form as St/ctopare/ia liiti'vstiticta^ 

 believing that IUhxllcti/a firu-noxa James was a distinct species of 

 Stlctopor'ella. More recent study, however, has shown that l)oth 

 names are founded upon unimpoi'tant nnitations of the same .species. 



X. jie.i-uosa is easily' recognized })y its narrow, generally parallel- 

 edgejl, bifoliate branches bearing- rather large elliptical, flaring zocp- 

 cial apertures, with th(Mr ends separatt>d always by two ))ut sometimes 

 hy three or four elongate interstitial cells. 



Occurrence. — Not uncommon in the Economy member of the F^den 

 shales in the vicinity of Cincinnati. Ohio. 



STIGMATELLA DYCHEI (James). 



Plate III, figs. 8-10. 



Monliculipora {Monotnjpu) dijchei James, Paleontologist, No. G, 1882, ji. 52. 



Montimlipora dyrhei J.vmes, Jour. Cincinnati Soc. Nat. Hist., VI, 1883, p. 235, 

 pi. X, figs. 2-2c. — Ja.mes and James, Jour. Cincinnati Soc. Nat. Hist., XI, 

 1888, p. 25.— J. F. Jamks, Jour. Cincinnati Soc. Nat. Hist., XVIII, 1895, p. 83. 



« Paleontologist, No. 3, 1875, p. 21. 



''Jour. Cincinnati Soc. Xat. Hist., II, 1879, p. :{0. 



'IiUmu, V, J 882, }). 151. 



