NAPLES FAUNA IN WESTERN NEW YORK, PART 2 307 



The specimens of this species described by Beushausen are from the 

 Goniatite beds at Nehden, and a variety of the same, larger and more 

 abundantly plicated (var. clymeniae), is from the Clymenia kalk of the 

 Enkeberg. This author regards the Cardiola nehdensis Kayser ' as 

 belonging to this species. 



Praecardium melletes sp. nov. 



Plate 11, fig. 20 



This is a small shell rendered oblique by the narrow, projecting 

 umbone. It is similar in aspect to P. v e t u s t u m, the plications being 

 broad, flat and simple, and the grooves of the same character, but it bears 

 only six of these plications. Though P. vetustum varies in the number 

 of its ribs, we have seen no typical example of it in which the number falls 

 below nine, and, as the increase in these simple ribs ceases at a very early 

 growth stage, P. melletes may represent an arrested condition at adult 

 growth. The single valve observed has a length of 7.5 mm and a width 

 of 6 mm. 



Habitat. From the sandstone slabs at the top of the Portage shales, 

 at the falls in Terry's ravine, Forestville, Chautauqua co. If this species 

 was ever a member of the Intumescens fauna, it has loitered here after the 

 disappearance of that fauna and is associated with a true Chemung com- 

 bination, Mytilarca umbonata, Lyriopecten triradiatus, 

 Crenipecten glaber, Athyriscora, Orthis cf. leonensis, etc. 



Praecardium duplicatum Miinster (sp.) 



Plate n, fig. 25 



Cardiola duplicata Miinster, Beitrage zur Petrefaktenkunde. 1840. Heft 3 



p. 68, pi. 13, fig. 20a, b ; pi. 12, fig. 21 

 Cardiola duplicata Kayser, Zeitschr. der deutsch. geol. Gesellsch. 1873. 



25:639, pi. 21, fig. 4 a, b (?) 

 Praecardium duplicatum Beushausen, Abhandl. der konigl. Preuss. Geolog. 



Landesanst. N. F. 1895. Heft 17, p. 303, pi. 31, fig. 4 a 



Shell of rather large size, with incurved beaks and prominent umbones, 

 which are strongly directed anteriorly and give the valves a marked obli- 



1 Zeitschr. der deutsch. geol. Gesellsch. 1873. 25:638. 



