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 Ihrenb. 
Marine. 
New 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 Ebrenb. 
Actinoptychus undulatus (Bailey?) Ralfs. 
Marine mud. 
Tampa Bay (G. H. Taylor). New Jersey. 
Actinoptychus splendens (Ehren), ?) Shadb. 
Brackish water. 
Tampa Bay (G. H. Taylor). New Jersey. 
Actinoptychus areolatus (Ehrenb.) Schmidt. 
AULISCUS Ehbrenb. 
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. 
PSEBUDAULISCUS Leud.-Fortm. 
Pseudauliscus radiatus (Bailey) Rattray. Auliscus radiatus Bailey. 
1 All the following species are from Mobile Bay. 
