DIATOMS. 143 
Subkingdom EUTHALLOPHYTA. 
Division EUPHYCEAE, 
Order BACILLARIALES. 
Family BACILLARIACEAE (DIATOMACEAE).' Diatoms. 
Subfamily DISCOIDEAE. 
PARALIA Heib. 
Paralia sulcata (Ehrenb.) Cleve. Melosira sulcata Kuetz. 
Marine. 
New Jersey. 
COSCINODISCUS Ebrenb. 
Coscinodiscus radiatus Ehrenb. 
Marine. 
Now Jersey. , 
Coscinodiscus subtilis Ehrenb. 
Marine and in brackish water. 
New Jersey. 
Coscinodiscus lineatus Ehrenb. 
Salt and brackish water. 
New Jersey. 
Coscinodiscus excentricus Ehrenb. 
Fresh, brackish, and salt water. 
New Jersey. 
ACTYNOPTYCHUS Ehrenb. 
Actinoptychus undulatus (Bailey?) Ralfs. 
Marine mud. 
Tampa Bay (G. H. Taylor). New Jersey. 
Actinoptychus splendens (Ehrenb. ?) Shadb. 
Brackish water. 
Tampa Bay (G. H. Taylor). New Jersey. 
Actinoptychus areolatus (Ehrenb.) Schmidt. 
AULISCUS Ebrenb. 
Auliscus caelatus Bailey. 
Marine. 
Tampa Bay (G. H. Taylor). New Jersey. 
Auliscus sculptus (Wm. Smith) Ralfs. 
Marine. 
New Jersey. 
Auliscus pruinosus Bailey. 
Marine. 
Tampa Bay (G. H. Taylor). 
Auliscus punctatus Bailey. 
PSEUDAULISCUS Leud.-Fortm. 
Pseudauliscus radiatus (Bailey) Rattray. Auliscus radiatus Bailey. 
1 All the following species are from Mobile Bay. 
