34 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxx. 



COELOCLEMA OWENI (James). 

 Plate VI, tigH. o, 6. 



Fistulipont Dwinil Jamks, Jour, ('hiciinniti Soc. Nat. Hiwt.j VII, 1884, p. 21, tig. 



2-2r/. 

 Monticnlipora {Fidulipora) oiucni J.\mes and Ja.mes, .luur. Ciiu-imiati Soc. Nat. ' 



Hist., XI, 1888, p. 84.— J. F. J.\mks, Jour, ('iiicinnati Soc. Nat. Hist., XVIII, 



1896, p. 119. 

 Codocleinu owfjii. Nickles and B.vs^^LEK, Bull. U. S. (re<jl. Surv., No. 173, 1900, 



p. 211'. 



The hollow, t-ontoi'ted or utricular stems of this form sire so differ- 

 ent in growth alone from the other species of the genus that its iden- 

 tification is (|iiite easy. The figures of the t^^pe specimen given t)\^ j 

 James are sufficient for the recognition of the species, but one of its 

 most marked characteristics — an unusually prominent lunarium — has 

 not been pointed out l)y its author. The lunaria are so strongl}' 

 developed and sharply raised that the zoarial surface is fairh' rough- 

 ened bv them. The lunarium is shown exceptionall}" well in tangen- 

 tial sections where the zocecia are seen to be so indented with it as to 

 be bilobed. In shape the lunariinn is semicircular with the ends j 

 pinched slightly together. The other internal characters are essen- J 

 tially the same as in the remaining species of ( or/tH-lema. ■ 



OccHvreuee. — A characteristic and <|nite al)iuidant fossil of the Mt. 

 Auburn beds. Lebanon, Ohio, is the tyi)e locality, but Cincinnati, 

 Ohio, Madison, Indiana, and other localities exposing this horizon, 

 furnish specimens. 



DEKAYELLA ULRICHI (Nicholson), 

 i'latt' II, tigs. .3, 4. 



Mo7di('H/;ij)ora {Heteruiri/pd) idriclin Nicholson, (fenus Monticulipora, 1881, |). 



131, fig. 22. 

 Dekai/eUa ulrichi Ulrich, Jour. Cincinnati Soc. Nat. Hist., VI, 1883, ])p. 91, 153. 

 Monticulipora o/i/ofinsis James, Jour. Cincinnati Soc. Nat. Hist., VII, 1884, p. 137, 



pi. VII, figs. 1, la. — James and James, .Tour. Cincinnati Soc. Nat. Hist, N, 



1888, p. 183.— J. F. James, Jour. Cincinnati Soc. Nat. Hist, XVI, 1894, p. 207. 

 Dehiyella rohmta Foord, Ann. Mag. Nat. Hist. (5), XIII, 1884, j). 341, \A. .\ii, 



figs. 2-2(/. 

 Dcka !/dla ulrichi-robustu ^ivKi.Es and Iiassi.eu, Bull. V. S. (it'ol. Surv., No. 173, 



1900, p. 228. 



Monticulipora ohioensis was distinguished l)v its author from M. 

 idrlehJ^ because (1) its interstitial tu])es (mesopore.s) were less closely j 

 tabulated than those of the latter si)ecies; (2) it had a more robust j 

 habit of growth, and (8) conspicuous monticules were present. The 

 first distinction is based on erroneons'observation, since the tabulation 

 of the mesopores of the t3'pes of 2L ohioensis is precisely the same as 

 in typical examples of I), ulrichi (see Plate II). The more robust 

 growth and cojispicuous monticules are characters of such minor 

 importance that they are scarcely worthy of .even varietal recognition. 



