Q2 PROCEEDINGS OF THE NATIONAL MUSEUM vol.87 



as well as weathered specimens show that the regularity is due to the 

 uniform size of the zooecia and direction of budding, and also since 

 each arises near the base of the preceding one on the opposite side of 

 the branch. The surface characters and the shape of the aperture are 

 the same as in Hederella. 



Reptaria can, therefore, be considered as a Hederella in which the 

 zooecia arise so nearly opposite each other as to give the branch the 

 appearance of two equal parallel rows arising from a median line. 

 In addition to the follo^^ing species, the genus includes Reptaria 

 (Bryozoon) steiningeri (Barrande, 1868) {Thamnocoelum pennulatum 

 Po6ta, 1894) and R. gigas Prantl, 1938, from the Silurian and Devonian 

 of Bohemia. 



REPTARIA STOLONIFERA R0II6, 1851 



Plate 16, Figures 4-8 



Reptaria stolonifera Roll6, in Leonhard and Bronn, Neues Jahrbuch, p, 810, pi. 9, 

 figs. 5, 6, 1851. — Hall and Simpson, Pal. New York, vol. 6, p. 274, pi. 65, pp. 

 17-19, 1887.— Simpson, 14th Ann. Rept. State Geol. New York, 1894, pi, 

 25, figs. 8, 9, 1897.— Grabatj, Bull. Buffalo Soc. Nat. Sci., vol. 6, p. 178, fig. 76, 

 1899. — Grabait and Shimer, North Amer. Index Foss., p. 120, fig. 180, 

 1907. — Bassler, in Cleland, Wisconsin Geol. Nat. Hist. Surv. Bull. 21, sci. 

 ser. 6, p. 57, pi. 6, figs. 7, 8, 1911.— Stewart, Geol. Surv. Ohio, ser. 4, Bull. 32, 

 p. 27, pi. 2, figs. 1,2, 1927. 



Ptilionella penniformis Hall, Trans. Albany Inst., vol. 10, p. 195, 1883 (abstract, 

 p. 195, 1881); Rep. State Geol. New York, 1883, p. 56, 1884. 



Ptilionella nodata Hall, Trans. Albany Inst. vol. 10, p. 195, 1883 (abstract, 

 p. 195, 1881) ; Rep. State Geol. New York, 1883, p. 57, 1884. 



Reptaria nodata Hall and Simpson, Pal. New York, vol. 6, p. 276, 1887. 



The zoarium in this species, the genotype, usually incrusts cephalo- 

 pod shells, where it covers areas as much as 50 sq. cm., composed of 

 branches of a uniform diameter of about 3 mm. dividing at long 

 intervals at angles of 45°-60°, but sometimes as often as every 10 mm. 

 or even less. Zooecia strongly annulated, the rings at times appearing 

 rather nodose, budding from near the base of the opposite preceding 

 one at an angle of less than 45° and increasing in width and curving 

 gently outward, attaining a length of 3 mm. and a width of 0.5 mm. 

 Measuring on one side of a branch, 5 to 6 zooecia in 5 mm. 



The type of Reptaria nodata Hall proves to be a much-branched 

 example of R. stolonifera. Thamnocoelum. pennulatum PoSta, 1894, 

 from the Devonian (E^) of Bohemia, judged from the illustration here 

 reproduced (pi. 16, fig. 9), is certainly a very closely related species. 



Occurrence.-Middle Devonian: Cazenovia, Brookfield, Kashong 



u fv f.';' ^- ^- (Ludlowville shale); Thedford, Ontario (Widder 



shale); MUwaukee, Wis. (Milwaukee Hmestone-Lindwurm member); 



2% miles southwest of Sylvania, Ohio (SHica shale); Falls of the Ohio 



(oellersburg limestone). 



Plesiotypes.—IJ.S.NM. Nos. 54577, 87892, 87893. 



