IQO . E. M. KINDLE 



by Williams in the early eighties, until the areal survey of the Wat- 

 kin's Glen quadrangle was undertaken. During this survey the 

 writer found it at several localities near the top of the Ithaca group. 

 In this zone Reticularia laevis is associated with typical Ithaca 

 species, such as Leptostrophia mucronatus, Spirijer mucronatus var. 

 posterns, and Pugnax pugnus. This zone near the top of the Ithaca 

 member lies about 650 feet above the Genesee shale. No higher 

 occurrence of the species within the Nunda formation is known. The 

 few fossils which occur in the upper half of the Nunda sections near 

 Ithaca belong to the Naples or western facies, a facies with which 

 Reticularia laevis has nowhere been found associated. In the Brook- 

 ton section, near Ithaca, the writer found a fourth zone of this species 

 entirely above the Nunda, and very near the base of the Chemung 

 formation. Here R. laevis occurs in abundance in the same bed 

 with Spirijer disjundus, which is also abundant. This, the highest 

 known horizon of R. laevis, is not more than 50 feet above the base 

 of the Chemung, and lies about 1,300 feet above the Genesee shale. 

 We are indebted to J. M. Clarke and D. D. Luther for the 

 recorded observations on the range of the species to the east and 

 west of Ithaca. Hall, in his orignal descriptions, reported the species 

 to occur' on the "shore of Seneca Lake," but gave no definite 

 locality, and the species was not found by subsequent workers in the 

 Seneca basin until a comparatively recent date. In 1885 Clarke wrote : 

 "I do not know of its occurrence^ west of Tompkins County." In 

 Clarke's first report on the Portage faunas of the Seneca basin R. 

 laevis does not appear. In the recent paper by Clarke and Luther 

 it is recorded from a single locality near Montour Falls. In this 

 region Mr. V. H. Barnett and the writer found this species at the 

 locality cited by Clarke and Luther, and also in the Watkins and 

 Havana Glen sections. It occurs in the Watkins Glen section about 

 185 feet above the level of Seneca Lake. These occurrences in the 

 Seneca basin are within the horizon occupied by the Ithaca fauna in 

 the section. The Naples facies has largely supplanted the Ithaca 

 facies in the Seneca section, greatly reducing the thickness of the 

 portion of the column occupied by it. 



1 Geology of New York, Report of Fourth District (1843), p. 245. 



2 Bulletin No. 16, U. S. Geological Survey, 1885, p. 66. 



