Bulletin - United States National Museum - Smithsonian Institution

More documents

Recommendations

Info

72 BULLETIN 96, UNITED STATES NATIONAL MUSEUM. Genus HOLOPORELLA Waters, 1909. 3909. Holoporella Waters, Reports on the Marine Biology of the Sudanese Red Sea, etc., pt. 12. The Bryozoa. Journal Linnean Society, Tion
EARLY TERTIARY CHEILOSTOME BRYOZOA. 73 base 2 cm. 5 mm. in width. The zooecia are disposed in two groups, back to back and inseparable. The axial zocecia back to back are oriented; all the other zooecia are cumulate. The superficial zooecia are distinct, urceolate, little raised, very oblique ; the frontal is quite convex, smooth, bearing 0-3 improminent avicularia with pivot ; the frontal is formed of a very thick olocyst. The apertura is oval, deeply imbedded at the base of a peristomie; the peristomice is ir- regular, suborbicular. The deep zooecia haA^e a flat frontal; their avicularia are prominent between the superficial zooecia. The inter- zoa'cial avicularia are distinct, elliptical, of the size of zooecia; they have a pivot; their orifice is like the beak of a duck; the pas- sage of the reflexor muscles of the operculum is indicated by the very small perforations on the inferior cavity ; the beak is salient above the zoarium. The incomplete zooecia are quite numerous. On many zoaria there are some distinct groups of large zooecia and of small zooecia. (ha=0.1i) mm. Measure7nents.—Apertura (interior) j ^^^ _q -j^^j ^^^^^^ fZs=0.60mm. Zocecia j^^ =0.30-0.35 mm. Variations.—Following the rule, the variations of these Cellepores are quite great, but the species is always rather easy to determine by its zoarial size. Occurrence.—Lower Jacksonian: Jackson, Mississij^pi (common). Middle Jacksonian: "Wilmington, North Carolina (common); 3^ miles south of Perry, Georgia (common). Upper Jacksonian: Cocoa post office, Choctaw County, Alabama (very common). Vicksburgian : 7| miles from Bladen vSprings, Alabama (rare); Bed Bluff, Wayne County, Mississippi (rare). Type.—Q2it. No. 62613,' U.S.N.M. Family CONESCHARELLINIDAE Levinsen, 1909. The zocecia are erect; the apertura is terminal. The gemmation is always and uniquely lateral. The ovicell is hyperstomial and recumbent. There is a zooecial and a zoarial hydrostatic system. This is a very mysterious group A^Iiich has given the zoologists much trouble. Only Maplestone in 1910 ^ has given some details on the zoarial life. Almost all our specimens belong to a new American genus Schizorthosecos. ' 1910. Maplestone. On the Growth and Habits of Biporae, Proceedings Royal Society Victoria, vol. 23.
Page 1:
11 U563 CRLSSI
Page 8 and 9:
ADVERTISEMENT. The scientific publi
Page 11:
PREFACE. Since 19vU the junior auth
Page 14 and 15:
8 BULLETIN 9C, UNITED STATES NATION
Page 16 and 17:
10 BULLETIN 96, UNITED STATES NATIO
Page 18 and 19:
1^ BtrLLETIN 96, UNlTEt) STATES NAT
Page 20 and 21:
Page 22 and 23:
Page 24 and 25:
Page 26 and 27:
Page 28 and 29: 22 BULLETIN 9G, UNITED STATES NATIO
Page 30 and 31: 24 BULLETIN 96, UNITED STATES NATIO
Page 40 and 41: 34 BULLETIN 9(3, UNITED STATES NATI
Page 42 and 43: 36 BULLETIN m, UNITED STATES NATION
Page 44 and 45: 38 BULLETIN 9C, UNITED STATES NATIO
Page 46 and 47: 40 BULLETIN 9
Page 48 and 49: 4^ BULLETIN m, UNITED STATES NATION
Page 50 and 51: 44 BULLETIN 9(3, UNITED STATES NATI
Page 56 and 57: 50 BULLETIN 9G, UNITED STATES NATIO
Page 58 and 59: 52 BULLETIN DC, UNITED STATES NATIO
Page 89: U. S. NATIONAL MUSEUM BULLETIN 96 P
Page 93: American Tertiary Cheilostome Bryoz
Page 97: U. S. NATIONAL MUSEUM American Tert
Page 101 and 102: Acanthionella (Escharifora) typica
Page 103 and 104: imperati, Schizellozoon (Retepora)
Page 105: INDEX. 87 Page. Tubucella 62 ( Esch
show all

Bulletin - United States National Museum - Smithsonian Institution

Create successful ePaper yourself

Delete template?

Save as template?