DESCRIPTION OF SPECIES 169 



Genus Glossina Phillips 



Glossina waverlyensis (Herrick) 



PL VII, fig. 4 



1875 Lingula scotica 1 Meek, Pal. Ohio, Vol. II, p. 276, PI. 14, Fig. 9. (NonL. scotica 

 Davidson) 

 Berea Grit: Berea, Ohio. 



1887 Lingula scotica (var. ? ). Herrick, Bull. Den. Univ., Vol. 2, p. 144, PI. XIV, 



Fig. 15. 



Coal Measures (Lower Mercer limestone) : Flint Ridge, Ohio. 



1888 Lingula waverlyensis. Herrick, Bull. Den. Univ., Vol. 4, p. 18, PI. 3, Fig. 1. 



Waverly Group: Newark, Ohio. 



Description. A form either identical with or closely related to 

 Glossina waverlyensis is represented in the collections studied by the 

 external molds of two individuals in a fair state of preservation, and 

 by several less perfect specimens, all from the Lower Mercer limestone 

 of Muskingum and Licking counties. Assuming that Meek's restoration 

 of Lingula scotica? from the Waverly group, and Herrick's drawings of 

 Lingula scotica (var.) from the Lower Mercer limestone, both of 

 which are based upon very fragmentary remains are accurate, our 

 form differs only in being a little broader in comparison to the length 

 of the shell. Typical G. waverlyensis, however, as later described by 

 Herrick, has the length and width of the shell almost equal, so that the 

 form under discussion seems to be intermediate between the former 

 and latter species. From the scanty material at hand and from the 

 lack of specimens of G. waverlyensis for comparison, it is not known 

 whether these differences in the shape of the shell are constant or whether 

 they can be accounted for by individual variation. For the present, 

 therefore, it seems unjustifiable to separate our form as a distinct species, 

 although after more material is examined, it is not unexpected that the 

 Pennsylvanian form will prove distinct from the Mississippian. Miss 

 Mark also figures G. waverlyensis and cites its occurrence in the Lower 

 Mercer limestone at several localities along Flint Ridge. 1 



The shell is cuneate in form, the ratio of the length to the width 

 being about 5:4, with the greatest width close to the anterior margin. 

 The lateral margins are almost straight or very slightly convex, the 

 anterior-lateral angles narrowly rounded, and the front broadly convex. 

 The surface is marked by about thirty-six sharply elevated, closely 

 arranged, concentric lirae, separated by broad flat interspaces which 

 are likewise marked by extremely minute concentric lines. Where 

 small portions of the shell still adhere to the molds the structure is 

 apparently punctate, although this character can by no means be 

 determined accurately. 



'Mark, C. G., Bull. Den. Univ., Vol. 16, pp. 281, 284, 291, PL VIII, Fig. 1, 1911. 



