58 
BULLETIN 125, UNITED STATES NATIONAL MUSEUM. 
and finely granulated. The opesium is elliptical, elongated; the opesiular indenta¬ 
tions are large, rectilinear, oblique, limited by a concave proximal border. The 
ancestrula is very small. 
Measurements. —Opesia 
ho = 0.12 mm. 
Jo =0.07 mm. 
Zooecia 
\Lz = 0.35 mm. 
I Iz =0.30 mm. 
Affinities. —On our type specimen we have observed neither onychocellaria nor 
ovicells. This is the smallest species of Floridina known. It differs from Floridina 
parvicella in its zooecia separated by a deep furrow and in its smaller opesial di¬ 
mensions. 
Occurrence. —Miocene (Duplin marl): Natural Well, 2 miles southwest of 
Magnolia, Duplin County, North Carolina (rare). 
Holotype.— Cat. No. 68478, U.S.N.M. 
Genus VELUMELLA Canu and Bassler, 1917. 
(For description, see Bulletin 106, U. S. National Museum, p. 213.) 
VELUMELLA ELONGATA, new species. 
Plate 14, fig. 5. 
Description. —The zoarium incrusts shells. The zooecia are distinct, separated 
by a furrow, large, elongated, ogival; the mural rim is thin, rounded, granulated, 
salient; the cryptocyst is shallow, flat, granulated. The opesium is large, semilunar; 
the opesiular indentations are of little depth, rounded, almost symmetrical. The 
onychocellarium is large, elongated, straight, acuminate or elliptical; its opesium 
is median, elongated, elliptical. 
,, . r, . \ho = 0.20-0.25 
e \lo =0.20-0.25 
Opesium of(7m = 0.35 mm. 
onychocellarium [In =0.15 mm. 
mm. 
mm. 
Zooecia 
\Lz = 0.55—0.65 mm. 
I Iz =0.35-0.40 mm. 
Onychocellarium 
Lon = 0.55-0.65 mm. 
Ion =0.35 mm. 
Affinities. —In its general aspect, the relations, of its dimensions and its frontal 
granulations, this species much resembles Vincularia ahyssicola Hincks, 1881 (not 
Smitt, 1872), from Singapore or the Philippines. It differs from it simply in the 
absence of lateral facets to the cryptocyst; that is to say, in the peculiarity charac¬ 
terizing Smittipora. The on} T chocellaria are not fusiform as in Rectonychocella and 
Diplopholeos. 
Occurrence. —Miocene (Dyplin marl): Natural Well, 2 miles southwest of 
Magnolia, North Carolina (rare). 
Holotype. —Cat. No. 68479, U.S.N.M. 
Genus MICROPORA Gray, 1848. 
(For description, see Bulletin 106, U. S. National Museum, p. 234.) 
MICKOPORA CORIACEA Esper, 1794. 
1862. Reptescharellina disparilis Gabb and Horn, Monograph Polyzoa Secondary and Tertiary 
formations of North America, Journal Academy Natural Sciences Philadelphia, ser. 2, 
vol. 5, p. 147, pi. 20, fig. 29. 
1912. Micropora coriacea Barroso, Briozoos de la Estacion de Biologia maritima de Santander, 
Instituto nacional de Ciencias Fisico naturales, p. 21. 
