REPORT OF THE STATE PALEONTOLOGIST 1902 909 



Genus nuculites Conrad 

 Nuculites triqueter Conrad, mut. pygmaeus nov, 



Plate 1, fig. 16, 17 



This species has a subtriangular outline, the length one fourth 

 to one third greater than the hight. The valves are strongly 

 and equally gibbous; umbones prominent; beaks strong and in- 

 curved. The clavicular septum is deeply impressed. A typical 

 specimen measures 2y 2 mm in length, 1% mm in hight and iy 2 

 mm in thickness. 



Localities. The form is abundant, occurring at Canandaigua 

 lake, Livonia salt shaft, Greigsville, at Moscow near the Dela- 

 ware, Lackawanna and Western Railroad and Little Beard's 

 creek. Total specimens 7. 



Nuculites oblongatus Conrad, mut. pygmaeus nov. 



Plate 1, fig. 7 



A single specimen from Moscow is in all respects except size, 

 like the N. oblongatus. It seems to be an adult, but 

 measures only 5 mm in length and 2 mm in hight. 



Genus leda Schumacher 

 Leda rostellata Conrad, mut. pygmaea nov. 



Plate 1 , fig. 5, 6 



The outline of this little, neat shell is falciform, the anterior 

 end being abruptly rounded, lower margin long and regularly 

 curved and the posterior end abruptly rounded. The hinge line 

 is concave. The anteriorly situated beaks are large and in- 

 curved. The smaller of the two specimens shows considerable 

 gibbosity in the umbonal region, and thence the shells taper 

 toward the rear. The larger of two specimens measures 2% mm 

 in length and 1 mm in hight, which is about one fourth the size 

 of the ancestral form. 



Localities. Canandaigua lake and Greigsville. 



Genus palaeonello Hall 

 Palaeoneilo plana Hall, mut. pygmaea nov. 



Plate 1, fig. 8, 9 



The outline of this species is subtriangular, the length about 

 one fourth greater than the hight. The valves are moderately 



