The !N'ew Species of Brachiopoda, 



327 



On the interior the valves have a notably broad margin of con- 

 tact. The internal cast sometimes shows this to be broadest at 

 the middle of the anterior margin ; faint radiating striae are also 

 observable on this cast. The muscular and vascular impressions 

 of the interior are frequently well defined, as described on the 

 page above cited. Length of the original specimen 16 mm., 

 width, 11 mm. 



Waverly group; Cuyahoga shales. Chardon^ Ohio. 



Fig. 1. Lingula paracletus. h, centrals; k, middle laterals; I, outside laterals; J, anterior laterals; 

 i, transmedians ; g, unibonal scar. 



Lingula taeniola. 



Plate 1, fig. 4. 

 Lingula lamellata, Hall. Palaentology of N. Y., vol. II, p. 55, pi. xx, figs. 4, 



a, h, c. 1853. 

 Lingula toeniola, Hall. Palaeontology of N. Y., vol. VIII, pt. 1, p. 173. 1893. 



Shell of medium size, with the margins diverging rapidly from 

 the apex for a short distance, thence curving rather abruptly into 

 subparallel lateral margins. The anterior margin is nearly 

 transverse. Surface covered with fine elevated, nearly horizontal 

 ornamental lines, which are crossed in the umbonal region by the 

 concentric growth lines. 



Clinton group. Clinton, N. Y. 



Lingula lingulata. 



Plate 1, fig. 3. 

 Lingula lingulata, Hall. Palaeontology of N. Y., vol. VIII, pt. 1, p. 173, 

 pi. iv k, fig. 5. 1893. 



Shell elongate-subquad rate, having somewhat the form of Lin. 

 gula oblata. Hall. Yalves very slightly convex. Distinguished 



