408 
BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 
c 
The only specimen found has been figured. 
Occui'rence . — Middle Jacksonian (Castle Hayne limestone) : Wilmington, North 
arolina (very rare). 
Holotype. — Cat. No. 64104, U.S.N.M. 
ROMANCHEINA PARVIPUNCTATA, new species. 
Plate 54, figs. 1-4. 
Description . — The zoarium is incrusting. The zooecia are distinct, irregular, 
very wide; the frontal is convex and formed of a tremocyst with small pores placed 
on a perforated olocyst ; the mucro is distinct, salient, tubular. The aperture is very 
oblique and hidden in the locella by a mucro. The ovicell is small, little salient, of 
the same nature as the frontal ; it opens well below the mucro. The avicularia are 
transverse, triangular, with a pivot, placed on each side of the aperture. 
M easurements . — Aperture ha— 0.14 mm. 
Zooecia 
Zs=0.56-0.60 mm. 
lz= 0.50-0.60 mm. 
Variations. — The two avicularia are small and rarely placed symmetrically; 
more often one of them is of much larger dimensions. Their disconcerting irregu- 
larity is inexplicable, for utility takes precedence of fantasy in the animal kingdom. 
The ancest.rula is a quite small zooecium with a frontal much reduced (fig. 4). The 
number of spines varies from two (figs. 1, 2) to four (fig. 4). The ovicell is always 
less wide than the zooecia (figs. 1, 2). The tremopores are so small that they are 
easily filled up ; the frontal appears more or less smooth. In the interior the aper- 
ture is bordered laterally by two large condyles (fig. 8). 
Occurrence. — Middle Jacksonian: Wilmington, North Carolina (rare); near 
Lenuds Ferry, South Carolina (rare) ; Eutaw Springs, South Carolina (very rare). 
Cotypes. — Cat. No. 64105, U.S.N.M. 
Genus PERISTOMELLA Levinsen, 1902. 
1902. Peristomella Levinsen, Studies on Bryozoa, Videnskabelige Meddelelser fra den 
• naturhistoriske Forening Kjobenhavn, p. 26. 
The aperture is oblique without lyrula, cardelles, or rimule. The ovicell is 
hyperstomial and embedded in the distal zooecia. It opens above the aperture 
and below the frontal mucro in a locella. The frontal is an olocyst perforated by 
some areolae and covered by a pleurocyst; the mucro is very salient, generally small 
and triangular. The avicularia are large and transverse; four distal spines. 
Dietellae. Neither armature nor condyles back of the apertura. 
Genotype. — Peristomella ( Cellepora ) coccinea Abildgaard. 1805. 
Range. — Lutetian-Recent. 
The fossil species of this genus are : 
Peristomella ( Lepralia ) peregrina Manzoni, 1889. 
Peristomella ( Lepralia ) fulgurans Manzoni, 1870. 
Peristomella ( Lepralia ) mamillata Wood, 1857. 
Peristomella ( Eschara ) alifera Reuss, 1869. 
