NORTH AMERICAN LATER TERTIARY AND QUATERNARY BRYOZOA. 
85 
are distinct, club shaped, with long, convex, and porous gymnocyst. The mural 
rim is thin and granular. The opesium is elliptical, elongate, surrounded by a 
salient rim; the two condyles are large and median. The cryptocyst is deep, 
smooth, and small. , 
,, . k = 0.14 mm, 
Measurements .—Opesia 7 . , _ 
r [lo — 0.10 mm. 
Zooecia 
Lz = 0.50 mm. 
= 0.20- 0.22 mm. 
Ajfiinities. —This species differs from Corynostylus labiatus in its unilamellar 
segments with only two zooecial rows and in the absence of a salient lip proximal 
to the opesium. Only the fragments figured have been found; they are extremely 
fragile. 
Occurrence. —Low r er Miocene (Bowden horizon): Cercado de Mao, Santo Do¬ 
mingo (rare). 
Cotypes. —Cat. No. 68515, U.S.N.M. 
E. Melicerita 
Fig. 14.—Genera of the family Cellariidae Hincks, 1880. 
A. Cellaria Authors. C. sinuosa Hassall, 1841. X 50. Recent. (After Hincks, 1880.) 
B. Erina Canu 1908. E. patagonica Canu, 1908. Cretaceous. (After Canu, 1908.) 
C. Cianotremella Canu, 1911. C. gigantea Canu, 1911. Cretaceous. (After Canu, 1911.) 
D. Euginoma Jullien, 1882. E. vermiformis Jullien, 1882. X 21. Recent. (After Jullien, 1882.) 
Upper right-hand figure, zooecium enlarged, showing ovicell. 
E. Melicerita Milne-Edwards, 1838. M. charlesworthi Busk, 1859. X 25. Pliocene. (After 
Busk, 1859.) 
Family CELLARIIDAE Hincks, 1880. 
Genus CELLARIA Authors. 
(For description see Bulletin 106, U. S. National Museum, p. 272.) 
CELLARIA FISSURIFERA, new species. 
Plate 34, figs. 15-18. 
Description .—The segments are cylindrical, slender at the base. The zooecia 
are rhomboidal, distinct, adjacent or partially separated by a very deep furrow; 
the mural rim is thin, salient, sharp, and ornamented w T ith small tuberosities; the 
cryptocyst is smooth, deep, scarcely convex. The apertura is semilunar, sur- 
