NORTH AMERICAN LATER TERTIARY AND QUATERNARY BRYOZOA. 151 



punctate zooecia with a subcircular orifice and a mucro like the preceding, but 

 its zooecia are much smaller than Porella {Palmicellaria) convoluta Ulrich and 

 Bassler, 1904, of the Maryland Miocene, and its mucro is less prominent. The 

 ovicells however are relativelj^ larger and longer. 



Measurements.— Apevtnral ^^"q 20 mm Zooecia, uregular. 



Occurrence. — Miocene (Calvert formation) : Reeds, Maryland (very rare). 

 Holotype.— Cat. No. 68656, U.S.N.M. 



Genus RHAMPHOSTOMELLA Lorenz, 1886. 

 (For description see Bulletin 106, U. S. National Museum, p. 476.) 



RHAMPHOSTOMELLA LATICELLA Canu and Bassler. 1919. 



Plate 5, fig. 13. 



1919. Rhamphostomella laticella Canu and Bassler, Geology and Paleontology of the West Indies, 



Bryozoa, Publications of the Carnegie Institution of Washington, no. 291, p. 94, pi. 5, 



fig. 12. 



The figured specunen is the only one found; it is unfortunately incomplete 



and worn and does not permit a detailed description. It incrusts a shell; the 



areolar costules are rare or little visible. The oral aviculariimi is quite large, 



oblique, the point directed toward the bottom. 



Occurence.— Lower Miocene (Bowden marl): Bowden, Jamaica (very ra'e). 

 Holotype.—C&t. No. 6S657, U.S.N.M. 



RHAMPHOSTOMELLA GRANULOSA, new species. 



Plate 3, fig. 2. 



Description. — The zoarium mcrusts shells. The zooecia are distinct, separated 

 by a deep furrow, elongated, elliptical; the frontal is very convex, covered with 

 a granular pleurocyst and bordered with small areolar pores. The apertura is 

 large, elongated, and deformed by a small, elongated, triangular avicularium 

 arranged obHquely. The ovicell is globular, very salient, and covered also with a 



granular pleurocyst. 



(?ia = 0.15mm. ^ - (Z2 = 0.55mm. 



Measurements.— Apertuml^ Za = 0.10 mm. ^ooeciaj ^2 = 0.25-0.30 mm. 



Affinities.— The zooecia are very irregular in their micrometric measurements. 

 The areolar pores are often hidden by the pleurocyst. 



This species approaches Rhamphostomella hrendolensis Waters, 1891, which is 

 often deprived of costules, but differs from it in the presence of the frontal granules. 



Occwrence.— Miocene (Bowden marl): Bowden, Jamaica (very rare). 



Holotype.—C&t. No. 68658. U.S.N.M. 



