266 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
11965 Platyceras deflectum Grabau. Holotype. 
Lower Cambrian. Sandy Cove, Cohasset, Massachusetts. 
Grabau, Occasional papers Boston soc. nat. hist., vol. 4, 
1900, p. 630, pi. 31, fig. 8a-b. 
11960 Platyceras primaevum Billings. Plesiotype. 
Lower Cambrian. Sandy Cove, Cohasset, Massachusetts. 
Grabau, Occasional papers Boston soc. nat. hist., vol. 4, 
1900, p. 628, pi. 31, fig. 7a-b. 
11955 Raphistoma attleborensis Shaler & Foerste. Plesiotypes. 
11957 Lower Cambrian. Sandy Cove, Cohasset, Massachusetts. 
Grabau, Occasional papers Boston soc. nat. hist., vol. 4, 
1900, p. 633, pi. 31, figs. lOa-c. 
11971 Scenella (?) sp. Holotype. 
Lower Cambrian. Pleasant Beach, Cohasset, Massa¬ 
chusetts. 
Grabau, Occasional papers Boston soc. nat. hist., vol. 4, 
1900, p. 637, pi. 31, fig. 6a-c. 
11962 Stenotheca abmpta Shaler & Foerste. Plesiotype. 
Lower Cambrian. Nahant, Massachusetts. 
Grabau, Occasional papers Boston soc. nat. hist., vol. 4, 
1900, p. 637, pi. 31, fig. 12b-c. 
11964 Stenotheca curvirostra Shaler & Foerste. Plesiotype. 
Lower Cambrian. Sandy Cove, Cohasset, Massachusetts. 
Grabau, Occasional papers Boston soc. nat. hist., vol. 4, 
1900, p. 638, pi. 31, fig. 13. 
11961 Stenotheca levis Walcott, Plesiotype. 
Lower Cambrian. Pleasant Beach, Cohasset, Massachu¬ 
setts. 
Grabau, Occasional papers Boston soc. nat. hist., vol. 4, 
1900, p. 641, pi. 31, fig. 15. 
11963 Stenotheca pauper Billings. Plesiotype. 
Lower Cambrian. Sandy Cove, Cohasset, Massachusetts. 
Grabau, Occasional papers Boston soc. nat. hist., vol. 4, 
1900, p. 639, pi. 31, fig. 14. 
