CATALOGUE. 
Fucoides (Caulerpa?) lycopodoides } A. Brongniart. Volt- 
zia Phillipsii , Lindley and Hatton. Fucoides selaginoides, 
Brongn. It occurs in the marl slate of Ferry Hill and Thris- 
lington Gap. Obscure impressions of probably the same 
plant are found in the corresponding rock at Whitley and 
Cullercoats. I possess a specimen of a plant, apparently a 
Confervites, from the marl slate at Midderidge. 
Neuropteris Huttoniana , n. sp. Only single pinnules or 
leaflets, with the venation rather imperfectly exhibited, have 
fallen under my notice. They closely resemble the pinnules 
of Neuropteris gigantea in form, but the veins are wider 
apart, somewhat as in N. heteropkylla. Thrislington, Mid¬ 
deridge, and Thick! ey, in marl slate. 
Lepidodendron, Catamites , and Sigillaria occur in the 
lower new red-sandstone, Westoe. 
Scyphia tuberculata , n. sp. Form cylindrical: surface 
tuberculated, with a central tube from which several smaller 
ones strike off to the surface. This sponge occurs at Hum- 
bleton and Dalton-le-dale. 
Manon ? mammillaris , n. sp. A mammillary polymor¬ 
phous sponge, having its surface crowded with minute pores. 
Humbleton. 
Petraia dentalis, n. sp. Form conical, and slightly 
curved: cavity deep, and longitudinally furrowed : plates of 
two sizes; the largest five or more in number, plain edged(P) 
and reaching half way to the centre ; the smallest from one to 
four in number ; lamellar interspaces with two very finely- 
denticulated slightly-prominent ridges. Humbleton. 
