PLATE XLVL 



Ki<;. l.—Biddulphia alaskiensis Mann. Enlarged 560 diameters. Description, p. 2 



a smooth variety _ ed 400 diameters Description 



Mann. Enlarged 660 diameters. Description, p 

 Fig. i.— /.'<</■ ../'(Mann. Enlarged 660 diameters. Description, p. 311. 



Temp, and Br.) Mann. Enlarged 660 diamet 



426 



