358 PROCEEDINGS OF THE GBOEO&ICAI. SOCrETY. [April 24, 



Plate XX. 



Fig. 1. Cucullma robusta, Eth. 



2. ■ cosfata, Eth. 



3. Nucula quadrata, Eth. 



4. gigantea, Eth. 



5. Leda elongata, Eth. 



6. Tellina marimburiensis, Eth. 



7. sp. 



8. Avicula alata, Eth. 



Plate XXI. 



Fig. 1. Natica lineata, Eth. 



2, 2a. Panojp(sa sulcata, Eth. 



3, '6a. flicata, Sow., var. acuta, Eth. 



4, Ammonites Sutherlandi, Eth. 



Plate XXJI, 



Fig. 1. Inoceramus marathonensis, Eth. 



2. multi'plicatus, Stol., rar. elongatus, Eth. 



3. pemoides, Eth. 



4. allied to problematicus, D'Orb. 



Plate XXIII. 



Ammonites Beudanti, var. Mitchelli, Eth. 



Plate XXIV. 



Ammonites Daintreei. 



Plate XXV. 



Fig. 1. Fenestella fossula, Sow. 



2. 2a. Ceriopora (?) ^aa^a, Eth. 



3. Avicula Hughendenensis, Eth. 



4. Pleurotomaria Cliftoni. 

 6. Homomya. 



6. Tholadomya. 



7. Myacites. 



8. Tancredia. 



Plate XXVI. — Lepidodendron nothum, linger. 



Fig. 1 . Part of a branch, clothed with leaves. 



2. Portion of the same magnified 2^ times. 



3. Part of a somewhat older branch, deprived of the leaves, and showing 



the bases somewhat larger than in fig. 1. 



4. Portion of the same magnified 2^ times. 



5. Fruit-bearing leaf of Lycopodium Gayanmn, Brongn. (from Brongniart's 



Hist. Veg. Foss. vol. ii. pi. xii. fig. 10 c.) 



6. Fruit-bearing leaf of L. nothum, Ung., from branch fig. 1. 



7. Dichotomously dividing branch, the upper part clothed with leaves; 



the lower without leaves, and showing the rhombic scars of the 

 leaves. 



8. Portion of another branch, showing the passage of the rhombic leaf- 



scars into the more compressed scars of the upper part : the scar of 

 the vascular bundle is situated in the upper angle of the leaf-scar. 



9. Part of a small branch, with rhombic scars, showing the scar of the 



vascular bundle as a line along the middle of each rhomb. 



