470 
BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 
area into two parts, is provided with a short, proximally directed process. The 
subopercular area, which is turned toward the aperture, has a transversally oval 
opening.” 1 
This is a very unusual type of avicularium which well characterizes this fossil 
species. 
Occurrence. — Middle Jacksonian: Wilmington, North Carolina (common): 
Eutaw Springs, South Carolina (rare) ; Near Lenucls Ferry, South Carolina (rare). 
Cotypes. — Cat. No. 64154, U.S.N.M. 
SMITTINA (?) PUPA, new species. 
Plate 95, figs. 1—9. 
Description. — The zoarium is subcylindrical, hollow, bifurcated, unilamellar, 
or plurilamellar. The zooecia are long, distinct, fusiform, or elliptical; the frontal 
is convex, smooth, bordered by a line of large rather widely spaced areolae. The 
peristome is thick, salient; the peristomice is suborbicular ; the apertura is oblique 
and semilunar. The ovieell is orbicular, little salient, ornamented by some large 
irregulai pores. On the line of the areolae, there are two small, salient avicularia, 
with pivot, orbicular more or less symmetrically disposed. 
,, , ^ ■ , rApe=0.15mm. r , . f Z.s=0.75-0.85 mm. 
{ lpe= 0.12-0.1O mm. [fe=0.35 mm. 
Affinities. — This species is unprovided with lyrula and the median avicularium 
is rarely visible; we must doubt its place in the genus Smittina. Nevertheless the 
other functions, ovarian and calcification are identical. It is remarkable to note 
that the larger the areolae are, the less numerous they are. The lateral avicularia 
always replace one of these areolae. 
This species differs from, Smittina tubulata Gabb and Horn, 1862, in the 
presence of two lateral avicularia and in the absence of median avicularium. In 
practice, the distinction between the Gvo species is often difficult; there are many 
specimens of Smittina tubulata which resemble Smittina pupa. 
On account of the size of the zoarium, this is a well characterized fossil. 
Occurrence. — Vicksburgian (“Chimney rock” of Marianna limestone): One 
mile north of Monroeville, Alabama (very common). 
Cotypes.— Cat. No. 64307, U.S.N.M. 
SMITTINA TUBULATA Gabb and Horn, 1862. 
Plate 94, figs. 1-11. 
1862. Semieschara tubulata Gabb and Horn. Monograph of the fossil Polyzoa of the 
Secondary and Tertiary formations of North America, Journal Academy Natural 
Sciences, Philadelphia, ser. 2, vol. 5. p. 122, pi. 19, fig. 5. 
1890. Semieschara tubulata DeGkegorio, Monographic de la Faune Eocenique de 1’Ala- 
bama et surtout de celle de Claiborne de 1'Etage Parisien, Annales de Geologie 
et de Paleontologie, Livraisons 7 and 8, p. 242, pi. 40, figs. 8, 24-28. 
Description. — The zoarium is cylindrical, hollow, tubular, uni or plurilamellar ; 
it incrusts small algae. The zooecia are large, long, elliptical, or tubular; the 
1 I.evlnsen, Morphological and Systematic Studies on the Cheilostomatous Bryozoa, p. 342, pi. 18, fig. 12. 
