224 The Ottawa Naturalist. [February 



Locality and formation. — South-west Point, Anticosti,division 

 4 of the Anticosti group, collected by J. Richardson, 1856. 



Cystiphyllum Niagarense, Hall, sp. 



Conopliyllum Niagarense, Hall. 1852. Palaeont. New York, vol. 

 II, p. 1 14, pi, XXXII, figs. 4a — n. 



Cystiphyllum Hwonense, Bill. 1866. Cat. Silurian Fossils of 

 Anticosti, p. 92. 



" Niagarense, Rominger. 1876. Geol. Survey Michi- 



gan, Fossil Corals, p. 137, pi. XLIX, fig. 3. 



" Niagarense, Sherzer. 1892. A revision and mono- 



graph of the genus Chonophyllum, Bull. Geol. Soc. 

 of Am., vol. 3, p. 266. 



The type specimen of C.Huronense is from the Niagara rocks 

 of Cockburn Island, Lake Huron and was collected by Dr. R. Bell 

 in 1865. Rominger has pointed out that Conophyllum Niagar- 

 ense, Hall is in reality a Cystiphyllum and mentions its occurrence 

 in the Niagara group of Drummond Island, Lake Huron and 

 at Point Detour as well as in the Niagara of Kentucky, Iowa 

 and Indiana. The specimen from Cockburn Island is preserved 

 in such a way as to shew the longitudinal ribbing of the surface, 

 the form, size and direction of the cystose plates within and the 

 radial rows of denticulations on the calicular margins as well as 

 a root-like extension near the basal extremity: details of structure 

 such as these, taken with the general form and manner of growth 

 of the corallum, induce the writer to believe that C Huronense 

 should properly be referred to Hall's species from the Niagara 

 of the State of New York. 



Rominger's description of this species is comprehensive and 

 accurately describes the Canadian specimen ; it appears in the 

 following words : — "Conical polyp cells attached to other bodies 

 at the base, and by additional root-like prolongations from the 

 sides. Stems elongated, subcylindrical, or shorter turbinate, 

 annulated by superficial constrictions with tortuous flexions, or 

 by periodical total interruptions in the growth of a calyx, and the 



