824 
BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 
PARLEIOSOECIA, new genus. 
The prefix “par” indicates the presence of club-shaped tubes. 
The tubes are club-shaped, bent at right angles at their extremity. The 
mesopores are numerous with vesicular walls. 
Genotype. — P arleiosoecia jacksonica , new species. Jacksonian. 
E x25 
Fig. 213,—Leiosoecia, new genus. 
A-F. Leiosoeoia ( Multicrescis ) parvicella Gabb and Horn, I860. A-C. Three views of ovi- 
celled specimens, X 12, showing that the ovicell obstructs a number of the zooecia. D. Tangen- 
tial thin section, X 25. E. Transverse thin section, X 25. F. Vertical thin section, X 25, 
showing the cylindrical tubes and the mesopores. 
Upper Cretaceous (Vincentown marl) at Vincentown, New Jersey. 
PARLEIOSOECIA JACKSONICA, new species. 
Plate 148, figs. 1-13. 
Description . — The zoarium is free, solid or hollow, irregularly cylindrical and 
branched; sometimes clinging to algae or to bryozoa, sometimes attached to the 
substratum by an expanded base. The tubes are club-shaped in the great part 
of their length, bent and cylindrical at their extremity (sections) ; the peristome 
is orbicular, thin, somewhat salient. The mesopores are numerous, polygonal 
with vesicular walls (section). The ovicell is orbicular, globular, very salient, 
absolutely smooth. 
