3-i LOWER CAMBRIAN FOSSILS WALCOTT. 



by Mr. Billings and no good result can now come from urging the use 

 of the name Archceocyathus, as originally proposed, it appears best to 

 accept Dr. Hinde's generic name. 

 Nat. Mus. Cat. Invt. Foss., No. 14688. 



Coscinocy athus B< > u x e m a n n . 

 See Zeitschr. d. deutseh. geol. Gesellsch., 1684, p. 704. 



Coscinocy athus billingsi Walcott. 

 Archceocyathus billingsi Walcott, 1886. Sec Bull. U. S. Geol. Survey, No. 30, p. 74. 



By the subdivision of the genus Archceocyathus this species is re- 

 ferred to Coscinocy athus. 



Nat. Mus. Cat. Invt. Foss., No. 15302. 



Archceocyathus (A.) dwighti sp. nov. 



This species differs from A. (A.) rensselaericus in having in the outer 

 wall a double row of pores and then a raised space upon which no pores 

 have been detected. Interior structure unknown. 



Localities.— Troy, N. Y., and near School-house No. 8, Greenwich, 

 Washington County, New York. 



Nat. Mus. Cat. Invt. Foss., No. 18352. 



Ethmophyllum meeki sp. nov. 



This form differs from E. whitneyi, with which it is associated, in 

 haviug stronger radiating septa, numerous dissepiments, and large pores 

 in the outer wall. 



Locality. — Silver Peak, Nevada. 



Nat. Mus. Cat. Invt, Foss., No. 18358. 



TRAILS, BURROWS, AND TRACKS OF ANIMALS. 



As far as known to me there are no true Algae found in the rocks of 

 the Lower Cambrian. That snch forms existed, there can scarcely be 

 any doubt, but, after a careful study of all the reported species, I think 

 that they can be referred to trails of worms or mollusks with more pro- 

 priety than to the Algse. * 



Planolites Nicholson. 

 Planolites Nicholson, 1873. Proc. Roy. Soc. Loudon, p. 289. 

 Planolites annularius sp. nov. 



The cast of a burrowing worm that shows numerous annulations. 



Locality. — At the Reynolds Inn locality, of Olcnellus asaphoirfes, 

 one mile west of North Greenwich, Washington County, New York. 



Nat. Mus. Cat. Invt. Foss., No. 18360. 



Planolites congregatus Billings. 

 PalcBophycus congregatus Billings, 1861. Bull. Geol. Survey Canada, p. 2. 



This and the following species were referred to the Alga? by Mr. 

 Billings. The reference may be correct, but the species impress me as. 



