NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
821 
salient and striated concentrically on the basal lamella. The central area is very 
large. The fascicles are salient, regular, from 18 to 22 in number, continued 
almost to the zoarial margin, monoserial. The tubes are rectangular, smaller than 
the cancelli and without visor. The cancelli are large and polygonal. 
'Diameter of the cancelli 0.12 mm. 
Diameter of the tubes : 0.10 mm. 
Diameter of the zoaria 3.00 mm. 
M easurements . — 
Affinities. — There is in the Oligocene a species very close to Ileteroporella 
defoi'mis Reuss, 1847, but in which the central area is much smaller. This species 
was refigured in 1877 by Manzoni with very different characters from the figure 
by Reuss, 1864, not cited, moreover, in the synonymy. On the other hand, Stoliczka, 
1861, having found the species of Reuss, 1847, in the Lower Oligocene of Latclorf, 
its discovery in the Vicksburgian is not unexpected. Our specimens are much like 
the figures of Lichenopora prolifer a by Reuss and Manzoni, and our identification 
appears to be good. 
Neviani cited this species in the Pliocene and in the Quarternary. Perhaps 
he confused it with Lichenopora rad lata Savigny-Audouin, 1826, although dis- 
tinction between the two species ought to be easy to determine. 
Occurrence. — Vicksburgian (Marianna limestone) : Salt Mountain, 5 miles 
south of Jackson, Alabama (rare). 
Geological distribution. — Latdorfian of Germany (Stoliczka) ; Helvetian of 
Italy (Neviani) ; Tortonian of Austria-Hungary (Reuss) ; Astian of Italy 
(Neviani). 
Plesiotypes. — Cat. No. 65473, U.S.N.M. 
LICHENOPORA GOLDFUSSI Reuss, 1864. 
Plate 162, figs. 8-20. 
1847. Defrancia stellata Reltss, Die fossilen polyparien des Wiener Terti'arbeckens, Hai- 
dingers’ naturwissenscliaftliche Abhandlungen, vol. 2, p. 87, pi. 6, fig. 2. (Not 
Goldfuss, 1827.) 
1864. Radiopor.a goldfussi Reuss, Zur fauna des deutschen Oberoligociins, Sitzungsberichte 
der k. Akademie der Wissenscbaften, Wien, vol. 5, p. 676 (sep. 65.) 
1S65. Radiopora goldfussi Retjss, Ueber die Foraminiferen und Bryozoen des deutschen 
Septa rienthones, Denkschriften der k. Akademie der Wissenscbaften, Wien, vol. 25, 
p. 84, pi. 10, figs. 11, 12. 
1877. Defrancia stellata Manzoni, I Briozoi fossili del Miocene d’Austria ed Ungheria, 
Denkschriften der k. Akademie der Wissenscbaften, Wien, vol. 37, p. 16, pi. 16, fig. 63. 
Description. — The zoarium is simple, discoidal, very convex; the lower face 
is very concave and striated concentrically. The fascicles are salient, regular, tri- 
serial, complete almost to the zoarial margins ; the central area is small. The tubes 
are a little smaller than the central cancelli. They are polygonal and deprived of a 
visor. The cancelli are large, polygonal, and without spinule. 
M easuremen ts . — 
•Diameter of the tubes 
Diameter of the cancelli 
Diameter of the large zoaria 
Width of the fascicles 
0.10 mm. 
0.10-0.14 mm. 
8.00 mm. 
0.30-0.40 mm. 
