TYPE SPECIMENS OF PALEOZOIC FOSSILS 731 



4598 -i2-|££ hypotype Ford. American journal of science and arts, 



ser. 3. 1877. v. i3,-pl. 4,.fig. 5; 1881. 22:251, fig. 3. 



Walcott. United States geological survey bulletin 30. 

 1886. pi. 17, fig. 7; pi. 20, fig. 3b. 



Walcott. 10th annual report of the director of the 

 United States geological survey. 1890. pi. 88, fig. id. 



Lower Cambric . Troy N. Y. 



S. W. Ford purchase 



4599 J^-f-- hypotype Ford. American journal of science and arts, 



ser. 3. 1877. v. 13, pi. 4, fig. 6. 



Lower Cambric Troy N. Y. 



S. W. Ford purchase 



4600 13 f 00 hypotype Ford. American journal of science and arts, 



ser. 3. 1877. v. 13, pi. 4, fig. 7. 



Lower Cambric Troy N. Y. 



S. W. Ford purchase 



4601 i3_|-2-& hypotype Ford. American journal of science and arts, 



ser. 3. 1877. v. 13, pi. 4, fig. 8. 



Lower Cambric Troy N. Y. 



S. W. Ford purchase 



4602 1 3 1 ° ° hypotype Ford. American journal of science and arts, 



ser. 3. 1877. v. 13, pi. 4, fig. 9. 



Lower Cambric , Troy N. Y. 



S. W. Ford purchase 



4603 — nf- hypotype Ford. American journal of science and arts, 



ser. 3. 1877. v. 13, pi. 4, fig. 10a, 10b. 



Lower Cambric Troy N. Y. 



S. W. Ford purchase 



4604 M^^- hypotype Ford. American journal of science and arts, 



ser. 3. 1881. 22:251, fig. 1. 



Walcott. United States geological survey bulletin 30. 

 1886. pi. 17, fig. 8; pi. 20, fig. 3a. 



Walcott. 10th annual report of the director of the 

 United States geological survey. 1890. pi. 86, fig. 3a ; 

 pi. 88, fig. ib. 



Lower Cambric Troy N. Y. 



S. W. Ford purchase 



