CAPE COD GEOLOGY 



151 



Matrix: Dark red, fine, micaceous ferruginous sandstone, probably a sandy oxidized 

 iron carbonate concretion. Some of the pieces have a hard, greenish-gray, only slightly weath- 

 ered center containing scattered grains of glauconite. 



Ostrea sp. (Same as in U. S. G. S. Coll. 1638, p. 2.) 



Paranomia scabra (Morton) ? 



Plicatula sp. (See Shaler's figs. 2, 2a, PI. 3.) l 



Pecten cf. P. argillensis Conrad 



Corhula cf C. carolinensis Conrad 



Collections made by J. S. Diller in 1894 



U. S. G. S. Coll. 1,639. Highland Bluff, Marthas Vineyard, Mass. 



Matrix: Dark red, fine, micaceous, ferruginous sandstone, probably oxidized sandy iron 

 carbonate concretions. 



Anomia argentaria Morton? (See Shaler's figs. 6, 13, PI. 2.) 

 Modiolus, probably a new species (See Shaler's figs. 17, 18, PL 2.) 

 Undetermined fragments of oysters and other bivalves 



U. S. G. S. Coll. 1,638. Oklahoma cliffs, Lagoon Pond, Marthas Vineyard, 



Mass. 



Matrix: Same as preceding. 



Ostrea sp. A small Gryphaea-like form, probably undescribed. (See Shaler's 



fig. 16, PI. 2.) 

 Exogyra ponderosa Roemer? 

 Paranomia scabra (Morton)? 



U. S. G. S. Coll. 1,637. Red sandstone mound near Indian Hill, near Woods 

 schoolhouse, Marthas Vineyard, Mass. 



Matrix: Medium coarse, red micaceous ferruginous sandstone, with some small pebbles 



of quartz. 



Gervillia (?) probably a new species. (Probably the same as Shaler's fig. 1, PL 2.) 

 Exogyra ponderosa Roemer ? 

 Ostrea sp. 



Collections sent to the United States National Museum, Nov. 9, 1904, 

 by J. B. Woodworth. Accession number 43432. 



U. S. G. S. Coll. 9,870. Cape Higgon, Marthas Vineyard, Mass. A loose 

 block collected by J. B. Woodworth. 



Matrix: Dark red, fine micaceous ferruginous sandstone, probably an oxidized concre- 

 tion of iron carbonate. 



Ostrea sp. (Same as in U. S. G. S. Coll. 1638, p. 2.) 



Exogyra ponderosa Roemer? (One medium-sized individual, apparently smooth.) 

 Plicatula sp. (See Shaler's figs. 2, 2a, PL 2.) 

 Modiolus n. sp. (Same as in U. S. G. S. Coll. 1639, p. 2.) 

 Crassatellites sp. 

 1 Shaler, N. S., Bull. Mus. Comp. ZooL, Harvard Univ., Geol. ser. 2, 16, pp. 89-97, 1889. 



