REPORT OF THE STATE PALEONTOLOGIST 1902 911 



thirds as long as the shell, the margin is evenly curved, round- 

 ing abruptly at the rear. From the beak a narrow furrow 

 extends to the middle of the margin, making a constriction 

 in the margin. The specimen measures iy 2 mm long by 2-3 mm 

 high and 4-5 mm in thickness. Its appearance is that of a young 

 Grammysia, but it is much more developed than any such shell 

 at that size. 

 Locality. Greigsville. 1 specimen. 



Genus buchiola Barrande 

 Buchiola retrostriata v. Buch, mut. pygmaea nov. 



Plate 2, fig. 7 



In outline and general form this specimen resembles the 

 species cited. However, the nodes are more rounded and more 

 abundant than in that species. There are eight radiating ridges 

 from the anteriorly placed beak. The central one of these has 

 on it five low knobs, the others fewer. The shell measures 

 3 mm in length and 2% mm in hight. 



Locality. Little Beard's creek, Moscow. 1 specimen. 



Genus conocardium Bronn 

 Conocardium eboraceum Hall, mut. pygmaeum nov. 



Plate 2, fig. 6 



This imperfect single specimen from near the Delaware, Lacka- 

 wanna and Western Railroad, Moscow, retains only enough to 

 enable one to ascertain that it belongs to this species. For the 

 pyrite, it is a large form, though not one fourth as large as the 

 ancestral form. 



GASTROPODA 



Genus diaphorostoma Fischer 

 Diaphorostoma lineatum Conrad, mut. belial Clarke 



Plate 4, fig. 9 



P 1 a t y stoma belial Clarke. U. S. Geol. Sur. Bui. 16. 1885. p. 30 



Like the typical P. 1 i n e a t a , the apex of the dwarf forms 

 is not complete, but two and one half to three whorls are pre- 

 served in each case. The spire is low; whorls ventricose, speci- 

 ally the last one; aperture orbicular. There is considerable 

 variability in the hight of the spire and the ventricosity of the 

 last whorl; but all variations seem to grade into each other, 



