DESCRIPTION AND INDEX OF PLATES. 



Plate I., Figs. 1 and 2, Euomphalus cristatus. 



Plate II. Fig. 1, Euomph. acutus ; Fig. 2; E. reginae, n. 8. ; Figs. 3 and 4, 



E. pugilis. Vide p. 60. 

 Plates III. and IV., illustrations of the Fossil Flora of the Lower Car- 

 boniferous beds of Germany and Ireland. Vide p. 134. 

 Plates V., VI., VII., VIII., and IX., illustrative of new genera and 



species of Polyzoa, vide p. 93 for details of species. Vide p. 77. 

 Plate X., illustrative of Fossil Flora of the Lower Carboniferous beds of 



Germany and Ireland. Vide p. 134. 

 Plate XL, new genera and species of Desmidiaceaj, vide -p. 129 for details 



of species. Vide p. 94. 

 Plate XII., Hypocalymna Philipsii, a new Myrtle; Figs. 1 and 2, a 



branch, natural size ; Fig. 3, calyx and ovary ; Fig. 4, transverse 



section of ovary; Fig. 5, insertion of anther lobes; Fig. 6, insertion 



of stamens. Vide p. 131. 

 Plate XIII., Greyia Sutherlandi. 

 Plate XIV., ditto. For details vide p. 139. 

 Plate XV., Steraclia Alexandri. Vide p. 140. 

 Plate XVL, Anagallis Huttoni. Vide pp. 141, 135. 

 Plate XVII., illustrative of the encysted state of Diatoma vulgare. Vide 



p. 164. 

 Plate XVIIL, Corynactis Allmani. Vide p. 185. 

 Plate XTX., on new Isopods. For details of species vide pp. 201. 



Vide p. 188. 

 Plates XX. and XXL, illustrative of new Irish Carboniferous Fossils. 



For details vide p. 283. Vide 281. 

 Plate XXIL, Cliftonia pectinata. Vide p. 275. 

 Plates XXIII. and XXIV.— Plate XXIIL, Figs. 1 to 4, Ornitho- 



rhynchus; 5 to 8, Echidna. Plate XXIV., Figs. 1 to 4, Hypsi- 



primnus; 5 to 7, Phalangista (Petaurus, F. Cuvier); 8 to 9, Mole. 



— 1, first pair of nerves ; 2, second ditto ; 3, third ditto, &c. ; 



*, corpus striatum ; t, thalamus ; q, corpora quadrigemina ; /, lobule 



of the cerebellum ; /, fornix; //, hippocampus; p, pituitary body; 



l>\ pineal ditto; c, commissure; c, corpus callosum; b, basilar artery ; 



f, internal car; ///. n aliens; /, inctlBJ f, stupe-. Vide p. 223. 



