NORTH AMERICAN LATER TERTIARY AND QUATERNARY BRYOZOA. 
59 
1917. Micropora coriacea Canu, Bryozoaires fossiles des Terrains du Sud-Ouest de la France, Bulle¬ 
tin de la Soci4t4 G4ologique de France, ser. 4, vol. 16, p. 135 (cites bibliography). 
1920. Micropora coriacea Canu and Bassler, Monograph Early Tertiary Bryozoa of North 
America, Bulletin 106, U. S. National Museum, p. 235, pi. 4, figs. 20-22. 
The only known occurrence in American post Oligocene strata of this well- 
known recent and fossil bryozoan is in the Pleistocene rocks of California, where it 
received the name of Reptescharellina disparilis Gabb and Horn, 1862. The species 
is discussed on page 235 of our volume on the North American Early Tertiary 
Bryozoa, where a more complete bibliography is given. 
Occurrence. —Midwayan, Jacksonian, and Vicksburgian of the United States 
Pleistocene: Santa Barbara, California (rare). 
Plesiotype. —Cat. No. 68480, U.S.N.M. 
Genus SELENARIA Busk, 1854. 
1S54. Sclenaria Busk, Catalogue marine Polyzoa, pt. 2, p. 101. 
The ovicell is endozooecial; it appears on the surface of the colony as low, 
rounded, pent-roof shaped swellings. The crvptocyst is perforated by the opesiules 
or limited by the opesiular indentations. The opesium is irregular. The opercular 
valve is limited by the distal part of the zooecial mural rim. Porous vibracula are 
disseminated among the zooecia. The zoarium is discoid and cupuliform; its inner 
surface is perforated by numerous pores. No spines. 
Genotype.—Selenaria maculata Busk, 1854. 
Range .—Claibornian to Recent. 
According to Levinsen, who wrote in 1909: 
The vibracula are an arched frontal surface perforated by numerous pores or by slits. A high ribbon¬ 
shaped lamina issuing from the one lateral margin in the distal part of the vibracularian chamber stretches 
over toward the opposite margin and not far from this bends inward toward the basal surface. It 
serves no doubt for the attachment of the flagellum. Distal wall with two multiporous septules, and the 
distal half of each lateral wall with a single one. Lateral walls are common to the contiguous neigh¬ 
boring zooecia. 
SELENARIA AURICULARIA, new species. 
Description. —The zoarium is a Lunulites form of 6 mm. in diameter. The 
zooecia are distinct, separated by a salient and wide mural rim, hexagonal, regular 
or transverse; the cryptocyst is deep, flat, smooth, and perforated by two large equal 
opesiules symmetrically arranged. The apertura is elliptical and transverse. The 
vibracula are very large, auriform, terminated by a short, hooked, small canal. 
The inner side is perforated by numerous pores regularly arranged on the inner layer 
and very irregularly disposed on the outer central layer. 
Variations. —The zooecia are very irregular in size and we have not been able 
to discover any constant micrometric measurements. The apertura is likewise 
irregular in its measurements. The vibracula are larger at the periphery than at the 
center. The opesiules alone are of the same diameter on all the zooecia. 
Affinities. —The form of the opesiules is quite variable in the genus Selenaria. 
They are perforated (as in our American species) in S. parvipunctata Maplestone, 
1904; S. bimorphocella Maplestone, 1904; and S. magnipunctata Maplestone, 1904. 
They are formed by deep lateral indentations in S. maculata Busk, 1862. They 
