FIGURE I. 
PLATE XXIII 
Biddulphia Roperiana, Grev., variety mollis, Mann, X 400. Pacific 
Ocean, S. S. “ Albatross,” station 3608. 
Plagiogramma sceptrum, Mann, 375. Galapagos Islands. 
Stephanopyxis ferox, Grev., X 400. California guano. From 
Moebius’ Plates of Diatoms. 
Triceratium sp.? X 660. Bering Sea. 
Entogonia Davyana, Grev., X 300 (= Heibergia Barbadensis) 
Barbados. From Moebius’ Plates of Diatoms. 
