SUPPLEMENT 



BRACHIOPODA INARTICULATA. 



DESCRIPTIONS OF NEW SPECIES 



REFERRED To IN THE PKECEDINU PAGES OR ON THE AC'CoMl'AN VINi; PLATE8. 



LiNGULA COMPTA, sp. IIOV. 



PLATE I, KKj. 1G. 



Shell very narrow, with lateral margins nearly parallel lor most of their length ; 

 the anterior margin transverse and the posterior less abruptly rounded. 

 Shell-substance thin. Surface marked by fine concentric striae. 



The interior of the brachial (?) valve bears two strong lateral muscular 

 ridges which meet in the median line at about one-third the length of the 

 shell from the anterior margin. A narrow median I'urrow extends from just 

 behind the center of the valve nearly to the anterior margin. Length of this 

 valve, 9 mm., greatest width, 4.5 mm. 



This species is allied to L. dmsa, Hall, but differs in its narrower form and 

 thinner shell. 



Hamilton group. Tichenofs Gully, Canandaigua Lake, N. Y. 



LiNGOLA SCUTELLA, Sp. nOV. 

 PLATE I, FIG. 30. 



Shell broad, subquadrate ; lateral margins parallel for a short distance, but soon 

 rounding to the extremities, which have about equal curvature. Length to 

 width as 2 to 3. Surfiice covered with more or less distinct concentric lines 

 and wrinkles. The interior of the original valve, a cast of the interior, 



