PLATE XGVIII. 

 Figures magnified 500 diameters. 



Figs. 1, 2, 3. BIDDULPHIA BAILEYII, W. S.; S. B. D., 45, f. 322: 62, f. 322; 



T. M. S., 1859, p. 12, 1, i. 59 ; V. H., 101, f. 4, 5. 

 Nearly akin to B. mobiliensis. 



Fig. 4. WOOLMANII, Kain and Schultze; Bull. Torrey 



Bot. Club, March, '89. Atlantic City. Ar- 

 tesian well. 



Figs. 5, 6. DECIPIENS, Grun.; V. H., 100, f. 3, 4. Atlantic 



City. 



" 7,8,9. ELEGANTULA, var. of Tuomeyii, Grev.; Schm. 



At., 119, f. 9, 10, 11. 



Fig. 10. COOKIANA, Kain and Sohultze. Artesian well, 



Atlantic City; Bull. Torrey Bot. Club, 

 March, 1889. Var. of B. Ornata, Cast., 1887, 

 p. 105, 23, f. 9. 



Figs. 11, 12. TENUIS, Bail., B. .1. N. H., vol. vii, 1 p. f. 25. 



Probably identical with B. Baileyi. Vide 

 Figs. 1-3. 

 " 13, 14. TRINACRIA, Bail.; B. J. N. H., p. 338, 1, f. 34, 



35. A a variety of Bid. Baileyi. 

 15, Ifi, 17. PORPEIA QUADRATA, Grev., T. M. S., 1863, p. 



65, 6, f. 20; V. H., 92, bis f. 15. 



" 18, 19. BRITTONIANA, Kain and Schultze, Bull. Tor- 



rey Bot. Club, Aug., 1889, p. 208, 92, f. 1, a. 

 b. c. Artesian well, Atlantic City. 



