NORTH AMERICAN LATER TERTIARY AND QUATERNARY BRYOZOA. 
173 
somewhat elongated, and bears a wide rimule which is rounded and deep; the 
peristome is wide, very little salient, and bears spines. The two vibracula are 
salient and orbicular, the ovicell is small, convex, smooth. 
Measurements. —Apertura 
ha =0.15 mm. 
la =0.12 mm. 
Zooecia 
Lz =0.60-0.75 mm. 
. lz =0.45-0.55 mm. 
Affinities. —This species differs from Mastigophora pesanseris Smitt, 1872, in 
its larger micrometric measurements, in its frontal granules larger and more appar¬ 
ent, and in its vibracula placed at the level of the rimule. 
Occurrence. —Miocene (Bowden marl): Bowden, Jamaica (very rare). 
Holotype.— Cat. No. 68694, U.S.N.M. 
Fig. 32.—Genus Temachia Jullien, 1882. 
A-C. Temachia opulenta Jullien, 1882. A. An incrusting specimen, X 8.5, from the Gulf of Gas¬ 
cony. B. Ancestrula and ancestrular zooecia, X 29. C. An ovicelled zooecium, X 29. 
Genus TEMACHIA Jullien, 1882. 
1882. Temachia Jullien, Dragages du Travailleur, Bulletin de la Societe de France, vol. 7, p. 510. 
Zooecia suberect, dilated at the base and narrowed like the neck of a bottle 
above; peristome split anteriorly and deprived of spines; ovicell globular with the 
opening corresponding to the incision in the peristome. Zooecia of origin (ances¬ 
trula) with a frontal wall entire and lattice like, with two strong lateral spines at 
the level of the orifice. (Translation, after Jullien.) 
Genotype .— Temachia opulenta Jullien, 1882. Recent. 
Genus CREPIDACANTHA Levinsen, 1909. 
1909. Crepidacantha Levinsen, Morphologic and Systematic Studies on the Cheilostomatous Bry- 
ozoa, p. 266. 
The zooecia, whose aperture has strong hinge teeth and a compound, well- 
chi tinized operculum, are in the proximal half provided with 9 to 12 very long 
marginal spines and 8 to 11 small uniporous pore chambers (dietellae) alternating 
as a rule with small intermediate chambers, each of which has an uncalcified spot 
