308 Transactions. — Geology. 



Enodia janischii, Grun. 



E. striata, n. sp., Gr. and St. 



Gcphyria incurvata, Arnott. 



Glyphodesmis marginata, n. sp., Gr. and St. 



Glypliodiscus scintillans, A. Schm. 



Glypho. stellatus, Grev. 



Goniotliecium odontclla, Ehr. 



Grammatophora occanica, Ehr. 



Hemiaulus amplectans, n. sp., Gr. and St. 



Hem. amplectans, var. major, n. sp., Gr. and St. 



Hem. angiistus, Grev. 



Hem. harhadensis, Grun. 



Hem. dissimilis, n. sp., Gr. and St. 



Hem. includcns (Ehr.), Grun. 



Hem. lyriformis, Grev. 



Hem. ornitliocephalus , Grev. 



Hem. poly niorphus, Grun. 



Hem. (?) tcnuicornis, Grev. 



Hyalodiscus arcticus, Grun. 



Hyal. radiatus (O'Meara), Grun. 



Hyal. sTibtilis, Bail. 



Huttoiiia alternans, n. gen., n. sp., Gr. and St. 



Hutt. virgata, n. gen., n. sp., Gr. and St. 



IstJtmia enervis, Ehr. 



Kittonia elaborata, n. gen., n. sp., Gr. and St. 



Kitt. virgata, n. gen., n. sp., Gr. and St. 



Lamprisciis (?) dehyii, n. sp., Gr. and St. 



Liradiscus ovalis, Grev. 



Mastogloia reticulata, Grun. 



Melosira borreri, W. S. 



Mel. clavigera, Grun. 



Mel. oamarucnsis, n. sp., Gr. and St. 



Mel. sol, (Ehr.), Kiltz. 



Mel. ivestii, W. S. 



Nitzschia antiqtia, n. sp., Gr. and St. 



Nit. grundlerii, Grun. 



Navicula apis, Ehr. 



Nav. biconstricta, n. sp., Gr. and St. 



Nav. braziliensis, Grun. 



Nav. decora, n. sp., Gr. and St. 



Nav. definita, n. sp., Gr. and St. 



Nav. dispersa, n. sp., Gr. and St. 



Nav. gemmata, Grev. 



Nav. (Alloneis^) grundlerii, Cleve and Grun. 



Nav. inelcgans, n. sp., Gr. and St. 



Nav. interlincata, n. sp., Gr. and St. 



Nav. margino-lineata, n. sp., Gr. and St. 



Nav. margino-piinctata, n. sp., Gr. and St. 



