210 BRITISH CARBONIFEROUS BRACHIOPODA. 



Lingula latior, M'Coy. PI. XLVIII, fig. 37. 



Lingula latior, M'Coy. British Palaeozoic Fossils, pi. iii d, fig. 33, 1855. 



Spec. Char. " Broad-ovate anteriorly, gradually acuminated posteriorly ; moderately 

 convex towards the beak, very gradually flattened towards the margins ; sides meeting at 

 the beak at an angle of about 75°; front wide, semi-elliptically rounded ; greatest width at 

 about the middle of the length, whence the posterior end is rapidly narrowed to the 

 beak. Surface with fine, sharply defined, strong, close, elevated, obtuse, concentric striae, 

 slightly irregular from occasional branchings and interruptions ; crossed in parts by 

 longitudinal microscopic striae. Length 4^ lines, proportional width ^° 5 ." (M'Coy, 

 p. 475.) 



Obs. I have never seen this so-termed species, although stated by Prof. M'Coy to be 

 not very uncommon in the black limestone over the main limestone of Derbyshire. It is 

 therefore provisionally given on the authority of Prof. M'Coy, and until the species ? may 

 have been completely studied. 



