242 
BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 
LUNULARIA? GRANDIPORA, new species. 
Plate 12, figs. 3, 4. 
Description . — The zoarium is probably a slightly convex Lunulites. The 
zooecia are disposed in radial and circular rows; they are large , elongated, distinct, 
separated by a furrow, and are without cryptocyst ; the mural rim is thin, complete, 
nearly level, with the summit sharp. The opesium is irregularly elliptical, very 
finely crenulated. The ovicell is typically endozooecial, very distinct, somewhat 
convex and separated from the mural rim. The vibracula are arranged in distinct 
rows; they are interzooecial, elliptical, symmetrical, and bear in their distal half 
two lateral condyles. On the inner side the ribs are convex and bear large tuber- 
osities. 
Affinities. — Lunularia grandipora differs from the other species of the genus 
Lunularia in certain essential characters which fact makes us doubt its position 
in the genus; the large opesium is that of the Membranipores ; the ovicell is not of 
the ordinary type, but is the typical endozooecial ovicell which we have observed 
in one group of Membranipores; finally, the vibraculum itself, although symmetri- 
cal, is elliptical and not lozenge-shaped and fusiform. We are probably dealing 
with an especial genus which must be classified near Vibracellina from which it 
differs in its orbicular zoarium and its symmetrical nonauriculated vibracula. 
Only three fragments of this interesting species have been collected, which is 
far too few upon which to base a new genus. 
Occurrence . — Claibornian (Lisbon formation) : Wautubbee Hill, 4 miles south 
of Enterprise, Clarke County, Mississippi (rare). 
Holotype. — Cat. No. 63840, U.S.N.M. 
LUNULARIA VERRUCOSA, new species. 
Plate 37, figs. 6-9. 
Description .- — The zoarium is a convex Lunulites bearing at the center a large 
number of closed hydrostatic zooecia quite verrucose. The polypidian zooecia are 
distinct, separated by a furrow, rectangular, transverse; the mural rim is little 
distinct from the cryptocyst and is somewhat projecting; the cryptocvst is much 
larger than the opesium, shallow, flat, and smooth; the opesium is elliptical and 
transverse with a proximal border sometimes convex. Its vibracula are arranged 
in special rows; they are small, lozenge-shaped, and without lateral condyles. On 
the inner side the ribs are flat, radial, and a little granulated on certain zoaria. 
Measurements .— Opesia 
Vibracula 
A<?=0.10 mm. 
lo=. 0.07 mm. 
Lv— 0.15 mm. 
lv=0.07 mm. 
Zooecia 
Lz= 0.24 mm. 
fe=0.25-0.30 mm. 
Affinities . — This species also belongs to the group of Lunularia radiata Lamarck 
from which it differs in its very small zooecial dimensions. 
It differs from Lunularia ovata because its opesium is transverse and not oval, 
and by the sides of the inner face, which are flat and almost smooth. 
