344 



should be called Columnaria Stokesii. 



Page 153. 



Line nine from bottom, for " 1886," read — 1881 ; and line eight from 

 bottom, for " 57," read — 57 c. 



Page 155. 



Line six from top, for " Porites," read Protaroea. 



Page 183. 



Line ten from top, for " original ", read — marginal. 



Page 193. 



For " SoLENOSPiEA PAGODA (Salter) var. occidentalis. " read : — 

 EcTOMARiA PAGODA (Salter) var. occidentalis, 



According to Miss Donald (Quart. Journ. Geol. Soc. Lond., 1899, vol. 

 55, p. 253) Solenospira (Ulrich, 1897) is a synonym oi Ectomaria, (Koken, 

 1896). 



Page 204. 



For " Endoceras (Naethecocreas) ceassisiphonatum, Whitea,ves ". 

 read : — 



Narthecoceras crassisiphonatum, Whiteaves. (Sp.) 



Page 205. 



Foe " Endoceras (Narthecoceras) Simpsoni, Billings. (Sp.)" read : — 



Narthecoceeas Simpsoni, Billings. (Sp.) 



Page 210. 



For "AcTiNOCEEAS (Deiroceras) Python, Billings (Sp.)" read: — 



Deikoceras Ptthon, Billings. (Sp.) 

 For " AcTiNOCEEAS (Sactoceras ? ) Canadense, Whiteaves," read : — 



Paractinocbras Canadense, Whiteaves. (Sp.) 

 This species is the type of the subgenus Paractinoceras, Hj'att, 1900. 



Page 213. 



For " Orthoceras anellus, Conrad." read : 



Spyroceras anellus, Conrad. (Sp.) 



In Bulletin 49 of the New York State Museum, Palseontologic papers 

 2 (December, 1901) p. 39, Ruedemann refers Orthoceras bilineatum. Hall, 



