NO. 1442. JAMES TYPES OF BRY0Z0A—BAS8LER. 23 



The descriptions bring out no distinctive characters and the figures, 

 especially of the internal structure, are inadequate and indeed quite 

 incorrect. Figs. 6-7 on Plate I faithfully present the characters 

 shown in the sections originall^^ used and figured by James and James. 

 A comparison of the two sets of figures will show decided differences. 



James's types prove to be the same as the Kentucky form of the 

 species well described by Ulrich as Monotrypella multitahulata.^ 

 However, since James's description and figures, as already stated, are 

 wholly inadequate and incorrect in the most essential features, it 

 clearly falls into s3"non3'm3" under the rules cited on a previous page. 



Occurrence. — Abundant in the Lexington limestone of the Trenton 

 at a number of localities in Kentucky. James's types were found at 

 Paris, Kentuckj^, but were erroneously recorded as coming from the 

 Cincinnati group. 



CALLOPORA ONEALLI (James). 



Plate VI, figs. 1, 2. 



Chsetetes ? o' nealli 3 AM^%, Introd. Catal. Low. Sil. Foss., 1875, p. 2. 

 Monticulipora o'nealli James and James, Jour. Cincinnati Soc. Nat. Hist., X, 



1888, p. 174.— J. F. James, Jour. Cincinnati Soc. Nat. Hist., XVI, 1894, p. 194. 

 Callopora onealli Miller, North American Geol. Pal., 1889, p. 296. 

 Not Monticulipora (Heterotrypa) o'nealli Nicholson, Genus Monticulipora, 1881, 



p. 118= Callopora onealli sigillarioides (Nicholson). 



The lower third of the Eden shale wherever exposed in the Ohio 

 Basin generally contains a small species of Callopora in abundance. 

 The same formation, especially the upper third, affords great num- 

 bers of two well-marked varieties. The small, earlier form of this 

 species was first described by James in 1875, as above cited, under 

 the name of Chsetetes ? o'nealli but figures were never published. In 

 1882, the same author distinguished one of the varieties as Monticuli- 

 pora {Heterotrypa) o)ieaUi f var. communis. The other variety is the 

 same as the form described in 1875 by Nicholson under the name 

 CJixtetes sigillarioides.^ In the "Genus Monticulipora," Nicholson 

 abandoned his species, believing it to be identical with C. onealli. 

 Nickles and Bassler in their Sjmopsis proposed the arrangement of 

 these forms as given in this paper, namely, recognizing C. onealli as 

 a distinct species with the two varieties communis and sigillarioides. 



The zoarium of C. onealli is of narrow, frequently dividing branches 

 1.5 to 2.0 mm. in diameter, often anastomosing so as to form a small 

 bushy clump. The zooecia, of which 5 to 6 occur in 2 mm., are oval 

 and separated by more or less numerous mesopores. Variety communis 

 has the same zoarial growth, but its branches are much more robust, 

 their average diameter being 7 mm. Its zooecia also are polygonal 



"Fourteenth Ann. Rep. Geol. Nat. Hist. Surv. Minnesota, 1886, p. 100. 

 6 Pal. Ohio, II, 1875, p. 203, pi. xxii, figs. 9, 9«. 



