132 
BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 
Upper Jacksonian (Ocala limestone) : 31 miles north of Grovania, Georgia 
(very rare) ; Alachua, Florida (very rare) ; 9 miles north of Ocala. Florida (very 
rare). 
Habitat . — Mediterranean : off France and Italy. Atlantic : the Madeira Islands 
and Tristan da Cunha. China Sea, at Tizarcl. Pacific: Japan (var. japonica Ort- 
mann, 1890). 
Plesiotypes. — Cat. Nos. 63894, 63895, U.S.N.M. 
GRAMMELLA TRANSVERSA Canu and Bassler, 1917. 
Plate 25, figs. 7, 8. 
1917. Grammella transversa Canu and Bassler, Synopsis of American Early Tertiary 
Cheilostome Bryozoa, Bulletin 96, United States National Museum, p. 20, pi. 2, fig. 6. 
Description . — The zoarimn incrusts bryozoa. The zooecia are but little elon- 
gated, broad, distinct; the mural rinl is thin, sharp edged, regular. The opesium 
is of the same form as the zooecium. The ovicell is salient, globular, smooth, 
and carinated. The avicularium is interzooecial small, elliptical, and the pivot is 
never median; its longitudinal axis is transverse with respect to the zooecia 1 axis. 
Measurements . — Opesia 
Ad=0.45 mm. 
7o=0.35-0.40 mm. 
Zooecia 
| Lz 
1 lz~ 
=0.55-0.60 mm. 
=0.46-0.50 mm. 
Affinities . — The avicularium is generally elliptical, but it is sometimes tri- 
angular (fig. 8). The mural rim exhibits a rare and interesting peculiarity. It is 
not provided with a side which merges into the zooecium so that the opesium is 
bounded by the termen itself of the mural rim. 
The present form differs from other described species of Grammella in its small 
avicularia transversally oriented. 
Occurence . — Middle Jacksonian: Wilmington, North Carolina (rare) ; Eutaw 
Springs, South Carolina (very rare). 
Cotypes. — Cat. No. 62579, U.S.N.M. 
GRAMMELLA PUSILLA, new species. 
Plate 25, figs. 9-13. 
Description . — The zoarimn incrusts other bryozoa and calcareous algae. The 
zooecia are small , elongated, distinct, oval, or elliptical, with or without a very small 
gymnocyst; the mural rim is quite prominent, thin at, the top, enlarged at the base, 
finely granulated. The opesium is elliptical. The ovicell is globular, granulose, 
deeply excavated, ornamented, with a callosity, and distinct from the mural rim. 
The ancestrula is small and its mural rim very thin. The avicularium is inter- 
zooecial, somewhat larger than an opesium; its pivot is placed a little below the 
transverse axis of the opesial ellipse. 
Measurements .- — Opesia 
7h?=0.26 mm. 
?6»=0.18 mm. 
Zooecia 
Lz=0A0 mm. 
7s=0.22-0.26 mm. 
