CLARK: NEW FOSSILS FROISI NEAR BOSTON. 481 
Raymond, P. E. 
1914. Notes on the ontogeny of Paradoxides, with the description of a new 
species from Braintree, Mass. Bull. Mus. Comp. Zool., vol. 58, p. 225- 
244, 1 pi. 
(P. haywardi Raymond is described as a species distinct from P. harlani 
Green.) 
Shimer, H. W. 
1907. A Lower-Middle Cambrian transition fauna from Braintree, Mass. 
Amer. Journ. Sci., ser. 3, vol. 24, p. 176-178, 1 text-fig. 
2. AN "OBOLUS PEBBLE" FROM THE BOSTON BASIN. 
Pebbles and boulders of qiiartzite containing an Upper Cam- 
brian fauna rich in individuals but poor in species are very com- 
mon on the beaches of Martha's Vineyard and Nantucket, and 
have been found to a limited extent on the mainland. They have 
been found as boulders in situ in the Carboniferous conglomerates 
of the Narragansett Basin, but the parent ledge has not yet been 
revealed. Beyond the limits of that basin these boulders have 
been reported from the beaches at Marshfield, Truro, and Prov- 
incetown, Massachusetts. It appears that within the Narra- 
gansett Basin the boulders in place are numerous in the southern 
and central parts but absent from the northern part. None has 
hitherto been reported from the Boston Basin, either in the 
drift or in place. ^ 
A few years ago I found one such boulder on the northern shore 
of Hull, Massachusetts. It is composed of a quartzite which has 
suffered the loss of most of its secondary quartz, so that it is now 
a none too compact sandstone. It is white, of fine grain; the 
grains are angular and the stratification is obscure except where 
indicated by the fossils. When whole it weighed al)Out four 
pounds. It contains abundant fossils, all of which belong to the 
species Oholus (Westonia) rogersi Walcott.^ 
The boulder lay on the outer ])each whose mat(Mials have l)een 
derived from Telegraph Hill, a drumlin which had been partly 
destroyed by the waves but is now protected by the rip-rap along 
iWoodworth, J. B. Mono^rr. U. S. Cool. Surv., no. .S3, p. 109-113. 1S99. 
- Walcott, C. D. Cainlniaii Braitliiopoda. Moiiogr. V. S. Cool. Surv., no. 
51, p. 403-465, 1912. 
