118 PLANTS OF RHODE ISLAND. 



MELOSIRA, Ag. 



1. nummuloides, Dillw. Newport, S. A. Briggs ; commou 



elsewhere. 



2. moniliforinis, Ag. Mark Rock, iS. A. Briggs. 



3. s\llcata, Elirb. Newport, S. A. Briggs. 



4. granulata, Ehrb. Newport, S. A. Briggs. 



STEPHANODISCUS, Ehrb. 

 , sp. Eaton Farm (fossil), Mr. Carr. 



STEPHANOPYXIS, Ehrb. 



ferax, Grev. Newport, S. A. Briggs. 



COSCINODISCUS, Ehrb. 

 lineatus, Ehrb. Eocky Point, S. A. Briggs- 



ACTINOPTYCHUS, Ehrb. 

 Iindulatus, Ehrb. Newport, S. A. Briggs. 



BIDDULPHIA, Gray, 

 pulchella, Gray. Rocky Point, S. A. Briggs, J. L. B. 



ISTHMIA, Ag. 

 nervosa, Kutz. Newport, &c. 



CH^TOCEROS, Ehrb. 



n. sp., Briggs. Newport, S. A. Briggs. 



SYNDENDRIUM, Ehrb. 

 Diadema, Ehrb. Newport, S. A. Briggs. 



COCCONEIS, Ehrb. 



1. dirupta, Greg. Rocky Point, S. A. Briggs. 



2. scutellum, Ehrb. Newport, S. A. Briggs. 



ACHNANTHBS. Bory. 



1. longipes, Ag. Newport, S. A. Briggs. 



2. brevipes, Ag. Rocky Point, Newport, etc., S. A. Briggs. 



3. subsessilis, Kutz. Rocky Point, <S. A. Briggs. 



CYMBELLA, (Ag.) Kutz. 

 gastroides, (Kutz.) Pi-ovidencc, &c. 



COCCONEMA, Ehrb. 



1. lanceolatum, Ehrb. Providence, Olney. No. 181. 



2. cymbiforme, Ehrb. Providence, Olney. No. 182. 



