NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
619 
Vicksburgian (Eecl Bluff clay) : Seven and one-half miles from Bladen Springs, 
Adabama (rare) ; Red Bluff, Wayne County, Mississippi (rare). 
Cotypes.— Cat. Nos. 62613, 64225, 64226, U.S.N.M. 
KLEIDIONELLA PARASITICA, new species. 
Plate 10. figs. 17-22. 
Description . — The zoarium is massive, originally spread out over the radicles 
of algae; it afterwards emits bilamellar and eschariform fronds, in which the axial 
zooecia are oriented. The superficial zooecia are salient, globular, oblique; their 
frontal is very convex, smooth and formed of a very thick olocyst; it bears 0 to 3 
small, elliptical avicularia, somewhat salient, with pivot. The apertura is oval, 
very deep; the peristomice is elliptical. The avicularia of the deep zooecia are 
more salient. The interzooecial avicularia are as large as the zooecia, elliptical, 
provided with a pivot and with a rounded beak. On the bilamellar branches the 
zooecia are oriented; they are elongated, somewhat distinct; the frontal is smooth, 
convex and garnished with three elliptical avicularia, little salient, with pivot. 
The very young zooecia have a large peristomice. 
Measurements . — Apertura 
Peristomice 
Zooecia 
(interior) 
f ha— 0.12 mm. 
| to =0.08 mm. 
(exterior) 
(interior) 
f kpe=0 . 20 mm. 
) tpe= 0.14mm. 
[Zs=0.44mm. 
I /.3=0.30-0.36 mm. 
Variations . — The fronds with oriented zooecia and with two lamellae, back to 
back, are not rare (figs. 18, 20. 21) ; at their base they bear some cumulate zooecia. 
The latter (fig. 22) are abundant on the incrusting zoaria. They have a distinct 
but little salient peristome. The lower face (fig. 19) of the incrusting zoaria 
presents nothing particularly remarkable. 
Affinities . — This species differs from Kleidionella grandis in its very small 
zoarium and in its smaller zooecia. 
It differs from Kieidionella. lohata in the constant presence of the cumulate 
zooecia, the rarity of the oriented zooecia, and the presence of the large interzooecial 
avicularia. 
Occurrence . — Lower Jacksonian: Three and one-half miles southeast of Shell 
Bluff Post Office, Georgia (common). 
Cotypes.— Cat. No. 63860, U.S.N.M. 
KLEIDIONELLA LOBATA, new species. 
Plate 79. figs. 2-14. 
Description . — The zoarium is free, compressed, formed of lobed bifurcated 
fronds borne on an expanded base; it is formed of two lamellae, back to back, and 
it bears some zooecia almost always oriented and very rarely cumulate. The ori- 
ented zooecia are indistinct; their frontal is thick, little convex, and bears one to 
