TYPE SPECIMENS OF PALEOZOIC FOSSILS 731 



4598 hypotype Ford. American journal of science and arts, 



ser. 3. 1877. v. 13, pi. 4j 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 13 I 00 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 j°° 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 13 |° & 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 13 g°° 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 — x^- 2 - 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 ii^Lfi. hypotype Ford. American journal ot 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 



