Noiw-'- JAMES' TYPES OF BRYOZOA—BASSLEU. 37 



relatively thicker form and more g-radual expansion from the pointed 

 striated base. These differences, however, are maintained only by his 

 three type specimens. A larger number of specimens shows that the 

 zoarium varies from narrow ])lades less than 2 mm. at their greatest 

 width to sword-shaped fronds () nmi. wide, Howcn^er, specimens of 

 the latter dimension are rare in the Eden shale, while the Fairvdew 

 species is seldom of less width. E. falciformJs is evidently a descen- 

 dant and a more robust form of E. acuminata. 



Occwrence. — Not uncommon in the Eden shale at Cincinnati and 

 vicinity. 



ESCHAROPORA HILLI (James). 



Ptilodictyct }dlli James, Paleontologist, No. 1, 1878, p. 4. 



Ptilodictija Idlli ITlrich, Jour. Cincinnati Soc. Nat. Hist., V, 1882, pi. vii, figs. 



7, 7a. 

 Ptilodicfya hill! Nettleroth, Kentucky Fossil Shells, 188.'S, ]). :\0, ]>]. xxxv, figs. 



1, 2, 4, 5. 

 Ts'sc/foropora /(?7/i Ulrich, (ieol. and Nat. Hist. Surv. Minnesota, Final Rep., HI, 



Pt. 1, 1893, p. 162. 



The .specific character of this fine species was pointed out by Mr. 

 James in his description as follows: ''The marked and decided difi'er- 

 ence between this species and P\tilodk-tya7\falc[f(>rmis Nicholson lies 

 in the prominent transverse ridges.'' The zoarium in this form, how- 

 ever, is usually wider and stronger than in Escharopora falciformis., 

 but as alread}" mentioned the transverse ridges are the most obvious 

 difference. These ridges are formed b}' the elevated macula?, which 

 are so transversely elongated that they become confluent. 



Oc<mrrenee. — The type specimen is said to have been found on the 

 bank of the Ohio River at Cincinnati. Evidently it was drifted here, 

 inasmuch as the Fairview rocks have furnished all other specimens 

 known to the writer. The type does not belong to the James col- 

 lection, so whether it occurred in situ at Cincinnati in the Trenton 

 outcrops along the river bank or was washed down from some geolog- 

 ically higher locality could not be determined. 



ESCHAROPORA PAVONIA (D'Orbigny). 



Ptilodictya pavonia D'Orbigny, Prodr. de Pal., I, 1849, p. 22. 



Montindipora {Monotrypa) pavonia Nicholson, Genus Monticnlijiora, 1881, p. 19.5. 



fig. 41, pi. VI, figs. 3, 3«. 

 Stictopm-a dathratnla James, Catal. Foss. Cincinnati Group, 1871. 

 Cha^tetes f chttJtratuluft Nicholson, Quar. .Tour. Geo). Soc. TiOndon, XXX, 1874, 



p. 509, pi. XXX, figs. 1-1//. 

 Chsetetei^ f (iatJiratidua Nicholson, Geol. Surv. Ohio, Pal., U, 1875, p. 209, pi. xxii, 



figs. 2-26. 

 Chastetes dathratulun Nicholson, Ann. Mag. Nat. Hist. (4), XVHI, 1876, p. 91, 



pi. V, figs. 9, 9a# 



- James's name Sticfopora clathratida was published without descrip- 

 tion and is therefore a nomen nudum. As indicated above, Nicholson 



