PLATE LXXVIII. 



Figures magnified 500 diameters. 



Figs. 1, 2. TERPSINOE INTERMEDIA, Grun. ; var. Bull. Torrey Bot. Club, 



August, 1889, Plate 93, f..2, 2a. Atlantic City. 



Fig. 3-5. BIDDULPHIA WEISSFLOGII, Jan. ; V. H., 100, f. 1, 2 ; Cast. 1887, 



p. 104, 26, f. 2. Doubtfully N. Amer. form. 



" 6. A questionable variety of this genus. Kain and 



Schultze, Bull. Tor. Bot. Club, Aug., 1880, Plate 

 93, f. 4. Atlantic City. 



" 7. TRICERATIVM INDENTATUM, Kain and Schultze, Bull. Tor. Bot. 



Club, Aug., 1889, PI., 92, f. 4. Artesian well, 

 Atlantic City, N. J. 



Figs. 8, 9. HEILPRINIANUM, Kain and Schultze, artesian 



well, Atlantic City, N. J. Bull. Tor. Bot. Club, 

 August, 1889, PL 93, f. 3, 3a. 'Surface with 

 central and angular elevations; the central ele- 

 vation shaped like a truncated pyramid ; punc- 

 tae radiate and coarser Ht center." 



Fig. 10. KAINII, var. coiistrictum ; Schmidt. Artesian 



well, Atlantic City. Bull. Tor. Bot. Club, 1889, 

 PI. 92, f. 3. 



11. ACTINODISCUS ATLANTICUS, Kain and Schultze, artesian well, 



Atlantic City, N. J. Bull. Tor. Bot. Club, 

 March, 1889, PI. 92, f. 7. Resembles a form oi 

 A. splendens. 



12. EUNOTIA AMERICANA, Kain and Schultze, artesian well, At- 



lantic City, N. J. Bull. Tor. Bot. Club, Aug., 

 1889, PI. 93, f. 1. 



13. ACTINOPTYCHUS UNDULATus, var. verrucosa ; W. and Chase, 



PL 2, f. 8. 



14. SYMBOLOPHORA TRINITATUS, Ehrb. Ber., 1844, p. 88; Sill. J., 



April, 1845, 4, f. c; M. Die., 19, f. 6. Prof. H. 

 L. Smith thinks this is nothing more than a 

 rounded fragment of Triceratium Marylandi- 

 cum ; hence, of no value. 



15. Discus UNBENANT, Greg., T. M. S., 1857, PL 4, f. 48. Transf. 



to till a vacant space. 



Hi. CHAETOCEROS (didymus, Ehrb.)? Bull. Tor. Bot. Club, Au- 



gust, 1889, Plate 92, f. (i. Artesian well, At- 

 lantic City. 



