Handbook of Paleontology 405 



and is thought to represent Portage time with the upper 

 beds as late as the Catskill. 



The Naples fauna, as stated in the general discussion 

 above, is a western fauna which has afforded a strange 

 association, particularly of bivalves. This fauna includes 

 the crinoid Melocrinus clarkei; the coral Aulopora annec- 

 tens; brachiopods as Productella speciosa, Chonetes sci- 

 tulus, Lingula triqueter; pelecypods as Lunulicardium 

 ornatnm, L. clymeniae, Loxopteria dispar, L. (Sluzka) 

 intumescentis, Ontario halli, O. suborbicularis, Cardio- 

 morpha obliquata, Paracardium doris, Buchiola retrostri- 

 ata, Elasmatium gozvandense; gastropods as Loxonema 

 noe, Palaeotrochus praecursor, Phragmo stoma incisum, 

 Protocalyptraea marshalli, Bellerophon incisum; cephalo- 

 pods as Manticoceras pattersoni, Tornoceras bicostatum, 

 T. uniangulare, Probeloceras lutheri, Cyrtoclymenia nea- 

 politana, Bactrites gracilior; the conularid Hyolithes nea- 

 polis; the pteropods Tentaculites gracilistriatus and Sty- 

 liolina fissurella; the crustaceans Eleutherocaris whit-, 

 fieldi and S pathiocaris emersoni. 



The Ithaca fauna is a modified Hamilton fauna and the 

 similarity of the faunas is very striking. This fauna, like 

 the Hamilton, is predominantly a pelecypod one. It in- 

 cludes brachiopods as Leptaena rhomboidalis, Stropha- 

 losia truncata, Leptostrophia perplana var. nervosa, 

 A try pa reticularis, Chonetes lepidus, Cyrtina hamilton- 

 ensis, Rhipidomella vanuxemi, Spirifer mucronatus, 

 S. mesastrialis, Reticularia hevis, Athyris spirifer oides 

 etc. ; pelecypods as Actinopteria eta, A. boydi, Grammy sia 

 subarcuata, G. bisulcata, Modiomorpha mytiloides, Gonio- 

 phora subrecta, Cimitaria recurva, C. elongata, Cypricar- 

 della bellistriata, Paracyclas lirata, Leptodesma rogersi, 



