n 



Cyst. 



184 



Cystiphyllum americanum continued. A good example 



CrCO Sfu! ^f the species is given in Win- 

 chell's Geological studies, 1886^ 

 page 214, fig. 134; upper end 

 of a large specimen of this com- 

 mon coral of the Hamilton 

 form ation . VIII c. 



Note. The preceding figure 

 was given by Professor Hall 

 together with the figure next 

 following and under the same 

 name of (7. cylindricum^ in his 

 volume of 1843. 



Cystiphyllum cylindricum (with the bases of crinoidal 



Hall. ST.!. 



columns or stone-lily stems growing upon it.) Hall, Geology 

 of Western New York, 1843, page 209, fig. 87, 1. Cylindri- 

 cal; straight or curved; outside very rough and striated; 

 inside wholly vesicular. Hamilton formation. (See Lonsdale 

 Sil. Res., p. 691, XVI, bis. figs. 3, 3a, 3b.) VIII c. 

 Cystiphyllum granilineatum. (Hall, 25th An. Rt. N. T. 



Mus.1882.) Collet's Indi- 

 ana Rt. 1882, page 274, 

 plate 15, fig. 13, side view 

 of an imperfect specimen, 

 and plate 23, fig. 13, its 



^,„„ ..,.__^ cup (calyx.) Has a close 



Jn^C'^^^^^SZ.P/. Z3 ^nwcfff. 15. general resemblance to the 

 shorter specimens of (7. niagarense^ but its lamellae and denti- 

 culations are much finer. — Louisville, Ky. Niagara, V 5. 



