274 
PALEONTOLOGY OF NEW YORK. 
Formation and localities. Hamilton group, Eighteen-mile creek, Erie county; 
Lodi Landing, Seneca lake, and near the head of Canandaigua lake, Ontario 
county, N. Y. 
THAMNISCUS, King. 1849. 
(See pages 41 ami 104.) 
Thamniscus pauciramus. 
NOT FIGURED. 
Thamniscus pauciramus, Hall. Trans. Albany Institute, vol. x, p. 197. 1S81. 
“ “ “ Report of State Geologist for 1883, p. 60. 1884. 
Zoarium frutieose, several stems arising from a common base, bifurcating 
and laterally branched, celluliferous on one face ; branches occurring at inter¬ 
vals of from 2.50 to 7 mm., diverging at an angle of about forty-five degrees; 
just above a bifurcation a little less than .50 mm. in width, very gradually 
increasing to .60 mm., sometimes of essentially the same size for nearly their 
entire length. On the non-celluliferous face the branches are gently con¬ 
vex, striated, from three to five striations on a branch, minutely granulose. 
Cell apertures oblique, circular, or sub-polygonal from mutual pressure, 
irregularly and very closely disposed, usually in contact. 
aa. aa. -v, .v. .al -V- -V, .v, aa. 
•7V*‘7Y''/V*‘7V*7VW‘7V**7C**W' 
Formation and locality. Hamilton group, Monteith’s Point, west shore of Can¬ 
andaigua lake, Ontario county, N. Y. 
KEPT ARIA, Rolle. 1851.* 
Reptaria stolonieera. 
PLATE LXV, FIGS. 17-19. 
Reptaria stolonifera, Rolle. Leonhard & Broun. Neues Jahrbuch, p. 810, pi. ix, tigs. 5, ti. 1851. 
Ptilionella pennifirrmis, Hall. Trans. Albany Institute, vol. x, p. 195. 1881. 
“ “ “ Report of State Geologist for 1883, p. 56. 1SS4. 
Zoarium parasitic procumbent, attached for its entire extent; consisting of a 
rachis, from which proceed laterally, at regular intervals, simple cell tubes, 
and, at irregular distances, tubes which have the same manner of growth as 
* I am indebted to Mi-. John M. Clarke for calling my attention to this genus, published in a work which 
has not been accessible to me. 
