NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
273 
Range. — Jacksonian-Recent. 
In the Eocene and the Oligocene we still recognize the single species Cellaria 
reussi D’Orbigny, 1852, of the Priabonian of Vicentin, Italy. 
CELLARIA STRICTOCELLA, new species. 
Plate 40, figs. 7-10. 
Description. — Zoarium articulated ; the segments cylindrical and symmetrical. 
The zooecia are elongated, narrow, confluent among themselves; the cryptocyst is 
of little depth, concave, smooth. The aperture is transverse, elliptical, without 
oral denticles. The ovicell is small, rectangular with an orifice of the same form. 
Measurements. — Aperture 
lia— 0.08 mm. 
7a=0.10 mm. 
Zooecia 
TjZ = 0.40—0.45 mm. 
7^=0.25-0.30 mm. 
Affinities. — Most of the time there is no oral armature; but sometimes deeply 
embedded lamellae are visible. 
The micrometric dimensions are greater in the middle of the segments than at 
their extremities. 
This species differs from Cellaria reussi D’Orbigny, 1852, in the form of its 
zooecia, which are not hexagonal and in their quincunx arrangement. 
It differs from Cellaria dimorpha , new species, in the absence of all zooecial 
dimorphism. 
Occurrence— Middle Jacksonian (Castle Havne limestone) : Wilmington, 
North Carolina (uncommon). 
Cotypes. — Cat. No. 64010, U.S.N.M. 
CELLARIA DIMORPHA, new species. 
Plate 40, figs. 11-13. 
Description. — The zoarium is articulated; the segments are large, symmetrical, 
somewhat conical, formed of a dozen longitudinal rows of dimorphic zooecia. The 
small zooecia are rectangular, elongated, confluent through their mural rim; the 
cryptocyst is smooth, deep ; the aperture is elliptical and transverse. Within the 
interior of the aperture there are two oblique symmetrically arranged lamellae. 
The ovicell is endotoichal; its orifice is circular and completed by a small canal 
the point of which is below and directed toward the proximal ovicell of the neigh- 
boring row. The large zooecia have the same characters as the small. 
- 
Measurements. — Aperture of f/m=0.10 mm. Aperture ofjA«=0.20 mm. 
small zooecia 17^=0.12 mm. large zooecia {?<2=0.24 mm. 
0 „ . fZs=0.50mm. T . fZs=0.45-0.55 mm. 
email zooecia < 7 . Large zooecia , . 
• [£3=0.20 mm. [fe=0.26mm. 
Affinities. — This species is very curious; and for the genus its characters are 
quite divergent. Unfortunately the different oral organs of the living species have 
not been thoroughly studied. 
55899— 19— Bull. 106- 
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