SFIRIFERA. 27 



is made by that author to pi. 244, fig. 5, of the ' Encyclopedic Methodique,' for a figure 

 of the type of his species, and which belongs to the well-known Devonian shell subse- 

 quently described and figured by Schlotheim in 1822, under the name of Terebratulites 

 aperturatus, and I am glad to find that Valenciennes' or Lamarck's name is now made 

 use of by the generality of palaeontologists. It is at the same time necessary to mention 

 that Valenciennes ' var. (pi. 244, fig. 4, of the ' Encyc. Meth.') is a specimen of Sp. dis- 

 juncta, Sow., and not of canalifera. 



Sp. canalifera occurs in the Devonian limestone of Paffrath, near Cologne, in Prussia. 



Not having been able to procure the sight of a specimen of the following four so- 

 termed species, and as the illustrations given by Phillips are extremely incomplete, I will 

 reproduce the original descriptions and figures simply as memoranda, not wishing to 

 take any responsibility as to their specific value. It is also uncertain whether the rocks 

 containing the first three are Devonian, or whether they should not be classed as Carbo- 

 niferous. 



? ? Spirifera mesomala, Phillips. PI. VI, fig 8. 



Spirifera mesomala, Phillips. Pal. Foss. of Cornwall, Devon, and West Somerset, p. 78, 

 pi. xxxi, fig. 137, 1841. 



" Characters. Depressed, transversely elongated, radiated from the beak, with many 

 small lateral and a few broad, flat, mesial undulations. It is this latter circumstance 

 which attracted my attention. The mesial ridge of the upper valve of ordinary Spirifera 

 is here a broad, flat, acute-edged fold, margined by two broad grooves, beyond which 

 small radiating ribs cover the sides. Locality. In North Devon, Brushford." 



? ? Spirifera obliterata, Phillips. PI. VI, fig. 10. 



Spirifera obliterata, Phillips. Pal. Foss. of Cornwall, Devon, &c, p. 78, pi. xxxi, fig. 

 135, 1841. 



" Semicircular, more than twice as wide as long, very convex, with extended acute 

 terminations to the cardinal area ; surface radiated with rounded, very little prominent 

 undulations, crossed by distant lines of growth. Mesial sulcus slight, placed between 

 two obtusely convex radiations much larger than the rest. Allied to Sp. speciosa, and 

 the species ranked with Sp. rhomboidea, Sp fusiformis, &c, in the Mountain-limestone. 

 Locality. In North Devon, Brushford." 



