260 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
11388 
12981 
12982 
5074 
3164 
12878 
12879 
3166 
12875 
12877 
6264 
Ceratiocaris acuminatus Hall. Plesiotype. 
Waterlime (Silurian). Buffalo, New Y r ork. 
Stose, Proc. Boston soc. nat. hist., vol. 26, 1894, p. 369, 
2 figs, in text. 
Dalmanites lunatus Lambert. Cotypes. 
Niagara (Silurian). Littleton, New Hampshire. 
Lambert, Bull. geol. soc. Am., vol. 15, 1904, p. 480, pi. 44, 
fig. 2. 
Lambert, History of Littleton, 1905, (sep.) “The geology 
of Littleton, N. H.,” p. 36, pi. 2, fig. 2. 
Illaenus ambiguus Foerste. Plesiotype. 
Niagara. Miffiintown, Pennsylvania. 
Foerste, Fifteenth ann. rept. geol. & nat. hist. surv. 
Minnesota, 1886, p. 480, fig. 3. 
Leperditia gibbera scalaris Jones. Cotypes. 
Lower Helderberg (Silurian). Pennsylvania. 
Jones, Ann. mag. nat. hist., ser. 3, vol. 1, 1858, p. 250, 
pi. 10, figs. 8, 9. 
Rogers, Geol. of Penn., 1858, p. 834, fig. 698. 
Leperditia ovata Jones. Holotype. 
Trenton (Ordovician). Potter’s Fort, Penn’s Valley, 
Pennsylvania. 
Jones, Ann. mag. nat. hist., ser. 3, vol. 1, 1858, p. 252, 
pi. 10, fig. 14. 
Rogers, Geol. of Penn., 1858, p. 834, fig. 697. 
Leperditia pennsylvanica Jones. Cotypes. 
Clinton. Barre Forge, Pennsylvania. 
Jones, Ann. mag. nat. hist., ser. 3, vol. 1, 1858, p. 251, 
pi. 10, figs. 12, 13. 
Rogers, Geol. of Penn., 1858, p. 834, fig. 699. 
Paradoxides harlani Green. Holotvpe. 
Middle Cambrian. Hayward Creek, Braintree, Massa¬ 
chusetts. 
Green, Am. journ sci., ser. 1, vol. 25, 1834, p. 336. 
