ANIMALS. 179 



Janeia Phillipsiana,^ King. Plate XVI, fig. 8. 



Magnesian limestone Solemya, resembling S. primeeva. King. London Geological 



Journal, vol. i, p. 10, 1846. 

 Solemya Phillipsiana, King. Catalogue, p. 11, 1848. 

 SoLENiMYA NORMALis, Howse. Trans. T. N. F. C, vol. i, p. 244, 1848. 



Diagnosis. — Valves compressed ; marked with a few rather distant, slightly raised 

 bands radiating from the umbones towards the posterio-ventral margin ; with the 

 posterior border of the anterior adductor muscular impressions corresponding with a 

 line drawn vertically from the umbone to the ventral margin.^ 



This is a more compressed species than Janeia biarmica ; and it is further dis- 

 tinguished by being marked externally with flat, slightly raised, spreading bands, 

 rather distant from each other. It has the posterior border of the anterior adductor 

 muscular impressions- perpendicular (vide PL XVI, fig. 8), which is different to what 

 prevails in Janeia primeeva, and Solemya Mediterranean in which this part is oblique. 



Janeia PJdllipsiana is a rare species in the Shell-limestone of Humbleton Quarry. 



Family Carditid^e {Les Cardites), Cuvier. 



The present group embraces Cardita, Carditamera, and some other existing genera ; 

 also Pleurophorus, and it is suspected Cardiomorpha, as well as a few more extinct co- 

 ordinate groups. 



Genus Cardiomorpha, De Koninck. 



Diagnosis. — " Shell equivalved : inequilateral : thin : generally oblique or trans- 

 versely elongated. Hinge linear ; without teeth. Cardinal plates smooth ; prolonged 

 from the umbones to the extremity of the cardinal margin. Ligament linear ; external. 

 Umbones recurved. Muscular impressions two, joined by a simple pallial line." (De 

 Koninck.^) 



Type, Cardiomorpha elongata, De Koninck. 



This genus, although edentulous, appears to be a member of Carditidce ; inasmuch 

 as it possesses the muscular impressions, cartilage fulcra, and transversely elongated 

 form characteristic of the family. It often resembles Modiola; but it differs therefrom 

 in having an external cartilage, which, together with an edentulous hinge, and an entire 

 pallial line, appear to be its chief distinctive characters. 



' Named in commemoration of Professor Phillips being the first discoverer of a fossil Solemyidia- — 

 the carboniferous Janeia primeeva. 



2 King, Catalogue, p. 11. 



•'' Description des Animaux fossiles qui se trouvent dans le terrain carbonifere de Belgique, p. 101. 

 " Testa sequival'vis, insequilatera, tenuis, plerumque oblique vel transversim elongata. Cardo linearis, eden- 

 tulus. Lamina cardinalis glabra ; ab umbonibus ad extremitatem marginis cardinalis products. Ligamentum 

 lineare, externum. Umbones recurvi. Impressiones muscularis duse, impressione palleali simplici conjunctse." 



