763 



Prod. 



(Productus punctatus, continued from p. 762.) 



diana Report of 1881, page 373, plate 42 VaiiOleve's figs. 1, 2, 

 3, front, back and side views of a full grown individual, from 

 Newport, Ind. Coal measures, XIII, — This is one of the best 

 known coal measure shells common to Europe and America. 

 Collett's Ind. Rt. 1883, page 124, plate 27, figs. 1, 2, 3, large 

 example, natural size. Ranges from subcarboniferous to top of 

 coal measures. XI to XV, 



Productus rogersi, N. & P. 1854. XIII 



Productus scahriculus. Europe. Near symmetricus. XIII 



Productus scitulus, M. & W. 1860. XI 



Productus semipunctus, Shepard, 1838. XIII 



