214 NEW YORK STATE MUSEUM 



Lingula rectilatera Hall. 



Plate 47, figures 3, 5, 6 



Lingula rectilatera Hall. Palaeontology of New York. 1859. 3:156, pi. 9, 

 fig. 6, 8 



This species was described from the New Scotland (Helderbergian) 

 fauna of eastern New York. Excellent representatives of it occur in the 

 Perce Rock. A similar species but with sharply concentric and elevated 

 surface striae occurs at Little Gaspe. 



Lingula spathata Hall 



Plate 47, figures i, 2 



Lingula spathata Hall. Palaeontology of New York. 1859. 3:157, pi. 9, 

 fig- 7, 9, " 



This is an elongate shell with lateral margin gradually diverging from 

 a blunt apex and the dorsal valve bearing a median septum. It was 

 described from the New Scotland fauna of New York, Shells of this spe- 

 cific type but some of these attaining larger size than the originals, occur 

 in the Perce Rock. 



Lingula elliptica nov. 



Plate 47, figure 4 



Shell of moderately large size, outline elongate and regularly elliptical, 

 there being for the dorsal valve very little difference in the curvature of the 

 umbonal and distal extremities, the latter being very slightly transverse, the 

 former quite regularly curved. Sides direct for a very short distance only 

 partaking of the curvature of the rest of the outline. Surface low and 

 evenly curved, margin bordered all the way round by a narrow flattened 

 area ; exterior marked by concentric lines of the usual style. On the inte- 

 rior of the dorsal valve is a long and low median ridge or septum, but in 

 the ventral valve there is no such feature. Length 19 mm, width 10 mm. 



Localities. Division i, Dolbel brook, Grande Greve. The species 

 seems to be also present at Perce Rock. 



Glossina acer nov. 



Plate 47, figures 7, 8 



Shell of relatively large size, subtriangular, with acute and prominent 

 beak from which the margins diverge rapidly for more than two thirds the 

 length of the shell, the distance across the pallial surface being four fifths 

 the length of the shell. Anterior margin broad and nearly transverse. 

 Surface covered by sharply elevated and distant concentric lines which are 

 mostly continuous though somewhat undulated but these frequently inoscu- 



