NORTH AMERICAN EARLY TERTIARY BRYOZOA. 219 
Occurrence . — Middle Jacksonian (Castle Hayne limestone) : Wilmington, 
North Carolina (rare). 
Cotypes. — Cat. No. 63978, U.S.N.M. 
DIPLOPHOLEOS LINEATUM, new species. 
Plate 82, fig. 15. 
Description . — The zoarium incrusts shells. The zooecia are hexagonal, elon- 
gated, confluent by means of their mural rims. The cryptocyst is deep, granular, 
longer than the opesium; the polypidian convexity is projecting, crenulated along 
its opesial border; the opesiular indentations are deep, sometimes linear; the 
opesium is elongated, semielliptical, narrowed above the opesiules by two promi- 
nent denticles. The onychocellarium is small, fusiform, without distal canal ; its 
opesium is median, elliptical, crenulated. 
,, r\ ■ \ho= 0.20 mm. 
M easurements . — Opesium \ 1 „ 
L Via— 0.12 mm. 
. ... fZ on= 0.35 mm. 
Onychocellarium 1 , . _ 
17 [lon=0 . 25 mm. 
Zooecium 
Lz— 0.44 mm. 
73=0.40-0.50 mm. 
The long linear opesia are rather rare; there are some perfectly round. The 
opesial dimorphism is not apparent on the few specimens we possess and we 
classify the species only by analogy. 
Affinities . — This species differs from Diplopholeos fusiforme in its small 
onychocellarium and its linear opesiules. 
The opesial dimorphism is not very evident on the specimens found. 
Occurrence . — Yicksburgian (Marianna limestone) : Near Claiborne. Monroe 
County, Alabama (very rare) ; Salt Mountain, 5 miles south of Jackson, Alabama 
(very rare). 
Yicksburgian (Byram marl) : Byram, Mississippi (rare). 
Holotype.— Cat. No. 64252, U.S.N.M. 
Genus FLORIDINA Jullien, 1881. 
1881. Floridma Jullien, Note sur une nouvelle division des Bryozoaires CReilostomes, 
Bulletin Soeiete Zoologique Prance, vol. 6, p. 13. 
The retractor muscles of the polvpide are attached in the median axis of the 
zooecium. The opesiular indentations are symmetrical, very large, limited above 
by the two very salient opesial processes and placed on each side of a much pro- 
duced, semitubular, polypidian convexity. The zooecium is closed by an operculum 
attached to the ectocyst; the opercular axis of rotation is located above the two 
opesial processes. The onychocellaria are straight, without the small, distal canal, 
rounded at their apex; the mandible is bimembranous. Ovicell endozooecial. 
The general aspect of the opesium is trifoliate. 
Genotype. — Floridina ( Mollia ) antiqua Smitt, 1872. 
Range . — Senoni an -Recent. 
Species of Floridina for the most part are found incrusting algae. 
