138 PROCEEDINGS OF THE ACADEMY OF [1890. 



Craspedodiscus coscinodiscus, Ehr. 



Craspedodiscus coscinodiscus var. Nankookensis, Grun. 



Cyclotella operculata, Kutz. 



Cymatopleura solea, W. i^m. 



DiCLADIA CAPREOLUS, Ehr. 

 DiSCOPEEA PHYSOPLEA, Ehr. 



DiMEREGRAMMA NovA C^SAREA, 11. sp., Kaiii & Schultze. 

 DiMEREGRAMMA NovA CiESAREA var. OBTUSA, 11. var., Kaiii & 

 Schultze. 



DiMEREGRAMMA FULYUM, (Greg) Ralfs. 



Epithemia Gibba, (Ehr.) Kutz. Rare. 



Ethmodiscus? sp? Castracane. 



Eucampia Virginica, Grun. Rare. 



EuNOTiA monodon, Ehr. Two varieties. 



EuNOTiA ROBUSTA, (Ehr.) Ralfs. Several varieties. 



EuNOTiA Americana, ii. sp., Kain & Schultze. 



EupoDiscus Argus, Ehr. 



Eupodiscus radiatus, Bailey. 



E^UPODiscus RoGERSii, Ehr. Varieties with 3, 4 & 5 processes. 



Eupodiscus sp. ? 



GONIOTHECIUM OBTUSUM, Ehr. 

 GONIOTHECIUM ODONTELLA, Ehr. 

 'GONIOTHECIUM RoGERSII, Ehr. 



Grammatophora SERPENTINA, Ehr. var. Ra»e. 



Hemiaulus affinis, Grun. 



Hemiaulus bipons, (Ehr.) Grun. 



Hemiaulus polycistinorum, Ehr. 



Huttonia Reichardtii, Grun. var. 



Hyalodiscus l.evis, Ehr. 



Hyalodiscus Stelliger, Bailey=(PoDOSiRA maculata, W. 

 Sm.) 



LiRADiscus MiNUTus, Grev. 



Mastogonia Actinoptychus, Ehr, 



Mei,osira sulcata, (Ehr.) Kutz. 



Plagiogramma Gregorianum, Grev. 



Pleurosigma Virginiacum, Peticolas. 



Pleurosigma, Sp. ? Fragments of a very large form allied to P. 

 angulatum. 



PsEUD-AULiscus RADIATUS, Bailey. 



Pyxidicula cruciata, Ehr, 



Rhabdonema Atlanticum, n. sp., Kain & Schultze. 



