381 



Matt. 



Matthevia variabilis. Walcott, Bulletin, U. S. G. S. No. 



30, page 224, plate 32, fig. 1 to 12 ; plate 33, figs, la to If.— The 

 first appearance of a family resembling the Conularia family, 

 in a Lower Cambrian formation, one mile north of Saratoga 

 Springs, N. Y. — Z. C. — Associated with Cryptozoon poriferum. 

 Hall, 36th An. Kept.; Platyceras minutissimum Walcott; 

 Ptychoparia Galcifera^ Walcott; Dicellocephalus hartii.^ Wal- 

 cott ; and Dikellocephalus speciosus Walcott ; — in limestone 

 over Potsdam sandstone. — Fig. 1, 2, 3, end, side and summit 

 views of the most characteristic form, enlarged \ Fig. 4, lid 

 (operculum), portions of shell removed; Fig. 5 more conical 

 than 1 ; Fig. 6, cast of inside of another lid ; Figs. 7, 8, 9, top, 

 end, side views of the conical variety, with deeply sinuous 



