29 Ithaca Group 29 



atites sp. , Coleolus sp. 



Station 7. — The upper Spirifer Icevis zone of the Portage is 

 exposed here, 140 feet above the lake. Spirifer Icevis occurs 

 here even more abundantly than at the Fall Creek locality. The 

 small number of associated species obtained is due doubtless to 

 the small amount of time spent in colle(5ling them. They are 

 as follows: Cho?ietes lepida, Nuada sp. , Crania sp., Leda diversa, 

 Palceoneilo Jilosa a, Ltinulicardium fragile^ crinoid stems. 



The 5*. IcBvis bed is followed by about 20 feet of coarse shales 

 alternating with thin bedded sandstone to the base of the Ith- 

 aca shale. 



Station 8. — From the lower part of the Ithaca shale, 160 feet 

 above the lake, the following species were obtained: Lunulicar- 

 dium fragile a, Leptodesrna sociale a, Lingula complanata a, Coleo- 

 lus aciaihcm , Comdaria congregata. 



Station p. — At the top of the falls, 225 feet above the lake, 

 the dark blue shaly sandstone contains a sparse fauna from which 

 the following species were recognized: ProduFlella tr^incata, Pal- 

 (Eoneilo constrilla, Pleurotomaria sp., Niicula sp. 



Station 10. —285 feet above the lake, the following species 

 were collecfted: Modioinorpha negleilaf , Palizoneilo co7istriBa, P. 

 filosa^ Glyptocardia speciosa, Spirifer mesacostalis, Rhynchonella 

 eximia^ Nitcula diffidens^ Pleurotojnaria sp., P. capillaria, Nucidi- 

 tes triqiieter, Taxocrinus ithacensis . 



The finding of Nucidites triqiieter at this station adds one more 

 species to the list of recurrent Hamilton fossils in the Ithaca 

 group. 



The presence of Glyptocardia speciosa at this station is an in- 

 teresting instance of the recurrence of one of the most charac- 

 teristic lower Portage fossils in the Ithaca fauna above the 

 Ithaca shale. 



Statio7i II. — This station which is 300 feet above the lake and 

 160 feet above the upper Spirifer Icevis zone is the highest point 

 at which good outcrops can be obtained. The following species 

 were found here: Palceoneilo constriSta, Leiorhynchus mesacostalis 

 a, Chonetes scitula, Spirifer mesacostalis, Miovdon gregarius, 

 Rhynchonella exiniia, PalcEoneilo filosa. 



