TYPE SPECIMENS OF PALEOZOIC FOSSILS 729 



Mesothyra (Dithyrocaris?) veneris see 

 Rhinocaris veneris 



microdiscus Emmons 



Microdiscus meeki Ford 

 45 8 7 ^t— TYPE Microdiscus meeki Ford. American journal 

 of science and arts, ser. 3. 1876. 11:371 (not figured ; 

 original of description). 



IWalcott. United States geological survey bulletin 30. 

 1886. pi. 16, fig. 4. 

 Walcott. 10th annual report of the director of the 

 United States geological survey. 1890. pi. 81, fig. 3. 

 Lower Cambric Troy N. Y. 



S. W. Ford purchase 

 Microdiscus speciosus Ford 

 588 A-2JL* a type Microdiscus speciosus Ford. American 

 journal of science and aits, ser. 3. 1873. 6:137, fig. 2a. 

 Lower Cambric Troy N. Y. 



S. W. Ford purchase 

 45 8 9 1A i A± type Ford. American journal of science and arts, ser. 3. 

 1873. 6: 137, fig. 2b. 

 Lower Cambric Troy N. Y. 



S. W. Ford purchase 

 459° — « A - hypotype Ford. American journal of science and arts, 

 ser. 3. 1877. 13:141 (not figured). 



Walcott. United States geological survey bulletin 30. 

 1886. pi. 16, fig. 3,3a. 



Lower Cambric Troy N. Y. 



S. W. Ford purchase 

 459 l Jfi k± hypotype Walcott. United States geological survey 

 bulletin 30. 1886. pi. 16, fig. 3b. 



Lower Cambric Troy N. Y. 



S. W. Ford purchase 

 moorea Jones & Kirkby 



Moorea kirkbyi Jones 

 4592 J --p fl type Moorea k i r kb y i Jones. Quarterly journal 

 of the geological society of London. 1890. 46:542, pi. 20, 

 fig. 9a, 9 b. 



Onondaga limestone (drift) Canandaigua, 



Ontario co. N. Y. 

 J. M. Clarke purchase 



