NORTH AMERICAN LATER TERTIARY AND QUATERNARY BRYOZOA. 
161 
m . . /m = 0.15 mm. 
Measurements .—Aperture , 
r la = 0.( 
Zooecia 
Lz = 0.65 mm. 
.06 mm. { lz = 0.40-0.45 mm. 
Affinities .—The present new species differs from Laminopora contorta Michel in, 
1842, in the position of its avicularium below the aperture. It differs from Lami¬ 
nopora arbuscula Calvet, 1907, in the greater length of its apertura (0.15 and not 
0.11 mm.), in its bilamellar zoarium and in its apertura not occupying two-fifths of 
the zooecial length. 
The avicularium is very irregular, sometimes straight with the beak directed 
above, sometimes transverse, triangular, or elliptical. 
Occurrence .—Miocene (Bowden horizon): Santo Domingo (very rare). 
. Holotype. —Cat. No. 68675, U.S.N.M. 
Fig. 28.—Genus Laminopora Michelin, 1842. 
A-F. Laminopora contorta Michelin, 1842. A. Sketch of aperture, X 85, showing elongated sinus. 
B. Zooecia, X 25. C. Mandible, X 85. E. Lateral view of a zoarium showing large vicarious vibracula. 
F. Zoarium, natural size, illustrating branching at right angles after forming very short branches only. 
(A-F, after Waters, 1919.) 
G-J. Laminopora arbuscula Calvet, 1902. G. Zooecia, X 45. H. Operculum, X 90, viewed on 
the outer side. I. Operculum, X 90, viewed on the inner side. J. Zoarium, natural size. (G-J, 
after Calvet, 1907.) 
Genus ADEONELLOPSIS MacGillivray, 1886. 
(For description, see Bulletin 106, U. S. National Museum, p. 563.) 
ADEONELLOPSIS COCCINELLA, new species. 
Plate 24, figs. 5-8. 
Description .—The zoarium is bilamellar with small irregular fronds. The 
zooecia are distinct, little elongate, elliptical, little convex; the frontal is perforated 
by four to seven stellate pores. The apertura is terminal, semilunar, with a slightly 
