20 Bulletin 6 30 



Section II, Cascadilla Creek. 



The Cascadilla creek se(5lion embraces the rocks exposed along 

 the gorge from the old mill to Eddy's dam, — about 320 feet of 

 strata. 



Station i. — This station is in the dark Ithaca shale at the 

 base of the lowest cascade in the gorge. The species common 

 here are typical of the Ithaca shale. They are Lunulicardiuni 

 fragile, Lingula compla^iata, Leiorhynchus niesacostalis (sm. var. ), 

 Rhynchonella eximia. 



Station 2. — About 30 feet above Station i, the following spe- 

 cies occur: Glyptocai^dia speciosa, Produflella truncata, Palaoneilo 

 Jilosa, Leiorhynchus viesacostalis, Microdon bellistriatus , Orthoceras 

 sp. , PalcEoneilo plana, Pleurotomaria capillaria, Microdoii gregarius. 



Statio7is J & ^. — About 55 feet above Station r, the following 

 species were found: Palczoneilo filosa, Nucula diffidens, N. corbuli- 

 for^nis, Microdo7i gregarius, Chonetes sutula, Palceoneilo maxima, 

 Rhynchonella eximia, Modiomorpha subalata var. chemungensis, 

 Spirifer mesacostalis, Leiorhynch^is mesacostalis, Ple^irotomaria cap- 

 illar iaf , ProduBella speciosa, Orthoceras sp. , A£li7iopteria boydi. 



Station 5. — 95 feet above Station i, the following species were 

 obtained: Spirifer mesacostalis , Rhynchonella eximia, Nucula diffi- 

 dens, PalcB07ieilo constrifta, P. filosa, P. plana, P. maxima, AH-in- 

 opteria perstrialis, Modiomorpha subalata var. chemungensis, Micro- 

 don gregarius , Chonetes setigera, C. scittda. 



Station 6. — 122 feet above Station i, the following species oc- 

 cur: Microdon bellistriatus, A£linopteria boydi, Rhyncho7iella ste- 

 phani, Spirifer mesastrialis , Grammy sia subarcuata, Nucula corbuli- 

 formis, Pleu7'otomaria capillaria, Modiomorpha subalata var. che- 

 7nu7igensis, A77iboccelia ui7ibo7iata, Spirifer mesacostalis, Leiorhyn- 

 chus 77iesacostalis, Orthoceras sp. , Cho7ietes scitula, Paltzoneilo max- 

 i7na, P. constriHa, P. filosa, Cyrtina ha7niltone7isis , Cryptonella eu- 

 dora. 



Station 7. — The following species were obtained 150 feet above 

 Station i: Spirifer mesacostalis , Pterinea reproba, Pleurotomaria 

 capillaria, Leptodesma sociale, Chonetes scitula, AElinopteria perstri- 

 alisf , StiSIopora meeki, Goniatites s^., Gra7nmysia elliptica, Chojie- 

 tes setigera, AHinopteria sp?, Cyrti7ia hatniltonensis , Belleropho7i 

 sp., Modio77iorpha subalata var. chemwigensis, Aflinopteria boydi, 

 Pal(eo7ieilo plana, Rhy7ichonella exiTnia, Plumuli7ia plumaria. 



