26 BRITISH DEVONIAN BRACHIOPODA. 



slate at Tintagel, &c. ; in the Middle Devonian limestone, at Woolborough, near Newton 

 Abbot j at Ilfracombe, Barton, Lummaton, and Hope's Nose, near Torquay, &c. Also 

 in slaty and sandy beds between thick Carboniferous Limestone and genuine Old Red 

 Sandstone in various localities in the County of Cork, Ireland. On the Continent it 

 abounds at Ferques, in the Boulonnais, &c, in France ; at Chimay, &c, Belgium ; 

 Ferrones, Spain ; in Nassau, Stolberg, near Aix-la-Chapelle ; in Russia, America, China, &c. 



? Spirifera canalifera, Val. (sp.) in Lam., 1819. PL VI, fig. 9. 



Terebkatula canalifera, Val. in Lam. Hist. Nat. des Animaux sans Vertebres, vol. vi, 



p. 254, 1819. Encycl. Metbodique, pi. ccxliv, fig. 5; and 

 Dav., Notes on an Examination of Lamarck's Species of 

 Fossil Terebratulae, Annals and Mag. of Nat. Hist., 2nd series, 

 vol.v, p. 442, pi. xiv, fig. 40, 1850. 

 Terebratulites aperturatus, Schloth. Nachtragen zur Petrefactenkunde, pi. xvii, fig. 1, 



1822. 

 Spirifera aperturata, Phillips. Pal. Foss. of Cornwall, Devon, and West Somerset, 



p. 77, pi. xxx, fig. 133, 1841. 



Spec. Char. Shell somewhat transversely sub-rhomboidal, rather wider than long ; 

 hinge-line shorter than the width of the shell ; cardinal extremities angular. Valves 

 convex, sometimes gibbous. Dorsal valve semicircular ; mesial fold sharply defined, of 

 moderate elevation, and flattened along its middle ; the surface of the valve is ornamented 

 by a variable number of simple or bifurcating ribs, these being smaller on the fold than 

 on the lateral portions of the valve. Ventral valve deeper or more convex than the 

 opposite one, with a wide, shallow sinus, this valve and its sinus being ornamented 

 similarly to the dorsal one. Beak more or less incurved, area triangular, and of variable 

 breadth. Fissure partly arched over by a pseudo-deltidium. Proportions variable. 

 Length 22, width 23, depth 20 lines. 



Obs. At p. 77 of his work on the ' Palaeozoic Fossils of Cornwall, Devon, and West 

 Somerset,' Professor Phillips mentions that only one specimen had occurred to his obser- 

 vation, from the coarse slaty rocks of Linton, in Devonshire, and that it may be viewed as 

 identical with the fossil of Bronn and Schlotheim, though there is a rather nearer approach 

 to equality between the mesial and lateral ribs. Not having been able to procure a sight 

 of the fragment described by Phillips, or of any other British specimen, I must quote this 

 species as a British fossil entirely upon the authority of Professor Phillips. Sp. canalifera 

 has much of the general shape of Sp. disjuncta, but will be easily distinguished on account 

 of the bifurcation of its lateral ribs, a feature not observable in Sp. disjuncta. When ex- 

 amining Lamarck's original types of fossil Terebratulae, which had been kindly lent me 

 by the Administration of the Jardin des Plantes, I had occasion to notice that the 

 Terebratida canalifera of Val. in Lam. belonged to the genus Spirifera, and that reference 



