408 BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 



The only specimen found has been figured. 



Occurrence. Middle Jacksonian (Castle Hayne limestone) : Wilmington, North 

 Carolina (very rare). 



Holotype.Cdt. 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. 



Measurements. Aperture ha=O.U mm. Zooecia {f ^l^' ;?, 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 ancestrula 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. 3). 



Occurrence. Middle Jacksonian: Wilmington, North Carolina (rare) ; near 

 Lenuds Ferry, South Carolina (rare) ; Eutaw Springs. South Carolina (very rare). 



Cotypes.C&i. No. 64105, U.S.N.M. 



Genus PERISTOMELLA Levinsen, 1902. 



1902. Peristomella LEVINSEN, Studies on Bryozoa, Yldenskabelige Meddelelser fra den 

 unturbistoriske 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) fu7.gura.ns Manzoni, 1870. 



Peristomella (Lepralia) mamillata Wood, 1857. 



Peristomella (Eschara) alifera Reuss, 1869. 



