574 BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 



Phylactella (Leprnlia) collaris Norman, 1866. 

 Phylactella (Lepralia) eximia Hincks, 1877. 

 Phylactella punctigera Waters. 1899. 

 Phylactella columnaris Kirkpatrick, 1888. 



PHYLACTELLA INFUNDIBULUM Canu and Bassler, 1917. 



Plate 71, figs. 24-20. 



1917. PhylactcUa infundttmlum CANU and BASSLEB, Synopsis of American Early Tertiary 

 Cueilostome Bryozoa, Bulletin 96, United States National Museum, p. 67, pi. 6. fig. 2. 



Description. The zoarium incrusts other bryozoa. The zooecia are large, 

 distinct, elongated, oval; the frontal is quite convex; it is formed of a tremocyst 

 with very small pores separated from each other by fine granules. The.apertura 

 is formed of a large semicircular anter, separated by two cardelles from a very 

 concave poster; the peristome is long, tubular, depressed in front, and interrupted 

 behind by a wide distal tongue; the peristomie forms a sort of funnel around 

 the apertura. The ovicell is large, salient, globular, finely porous and granular; 

 it is hyperstomial, recumbent, and it opens into the peristomie. 



.. . fZs=1.25mm. 



Measurements. Apertura < 7 _.,- ,. 1f . Zooecia 7 _ _ n 



Ua=0.16-0.17 mm. lfe=0.72 mm. 



This superb species is unfortunately quite rare. 



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

 North Carolina (rare). 



C'otypes.Csit. No. 62607, U.S.N.M. 



PHYLACTELLA PARVICOLLUM, new species. 



Plate 72, fig. 9. 



Description. The zoarium incrusts shells. The zooecia are distinct, elongated, 

 elliptical or oval; the frontal is convex and formed of a tremocyst with very small 

 pores separated by small salient granulations. The apertura is orbicular; it is 

 formed of a large anter separated by two small cardelles from a small concave 

 and finely denticulated poster; the peristome is small, little salient, often inter- 

 rupted .distally by a small salient tongue. 



(ha=0.l5mm. \Ls=O.GOmm. 



Measurements.- Apertura 7 ni! . Zooecia 7 



|/a=0.1o mm. |/.J=0.45-0.oOmm. 



Affinities. This charming species is unfortunately rare and we have not had 

 the good fortune to discover the ovicell. 



It differs from Phylactella infundibulum in its micrometric dimensions, which 

 are twice as small. On the other hand, its zooecial length, 0.60 mm., is much 

 greater than that of Phylactella parvicella (Ls=OAO mm.). 



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

 Carolina (rare). 



Holotype.CsLi. No. 64192. U.S.N.M. 



