146 PLANT LIFE OF ALABAMA. 
AMPHIPRORA Ehrenb. 
Amphiprora costata O’Meara.! 
PLAGIOTROPIS Pfitz. 
Plagiotropis vitrea (Wm. Smith?) Grunow. <Amphiprora vitrea Wm. Smith. 
Plagiotropis elegans (Wm. Smith) Grunow. <Amphiprora elegans Wm. Smith, 
CYMBELLA Agh. 
Cymbella heteropleura (Ihrenb.) Kuetz. 
AMPHORA Ebrenb. 
Amphora proteus Gregory. 
Brackish or salt water. 
New Jersey. 
Amphora clevei A. Schmidt. 
Amphora cingulata Cleve. 
NITZSCHIA Hassal. 
Nitzschia scalaris (Ehrenb.?) Wm. Smith. 
Fresh or brackish water. 
New Jersey. 
Nitzschia sigmoidea (Nitzsch) Wm. Smith. 
Fresh water. 
New Jersey. 
Nitzschia circumsuta (Bailey) Grunow. 
Subfamily SURIRELLOIDEAE. 
SURIRAYA Turp. 
Suriraya febigerii Lewis. 
Brackish water. 
Tampa Bay. New Jersey. 
Suriraya fastuosa Ebrenb. 
Marine. 
New Jersey. 
CYSTOPLEURA Brébis. 
Cystopleura zebra (Ehrenb.) Kuntze. pithemia zebra Kuetz. 
CAMPYLODISCUS Ehrenb. 
Campylodiscus clypeus Ebrenb. 
Campylodiscus limbatus Brébis. 
Class CHLOROPHYCEAE. Green Algae. 
Order PROTOCOCCALES. 
Family HYDRODICTYACEAE. 
HYDRODICTYON Roth. 
Hydrodictyon reticulatum (L.) Lagerh. 
Stagnant pools, ditches. Over the State. 
United States, Canada, Europe. 
'There is some uncertainty about this name.—Ed. 
