Xll LIST OF ILLUSTBATIONS. 



PAOB 



G.162. — Semiphyllum Siluriense, M'Coy; Silurian, Wenlock (Geol. 



Mag. 1887, p. 99, E. F. Tomes) 107 



, 163. — Calceola sandalina, Lamk. ; Devonian, Eifel and Devonshire ... 107 



, 164. — a, Latomceandrcea Flemingii, M. Edw. ; Inf. Oolite, Somerset. 



b, Montlivaltia trochoides, M. Edw. (Prestwich's Geology) ... 109 



, 165. — a, Thecosmilia annularis, Flem. ; Coral Rag, "Wilts, b, Isastreea 



explanata, Goldf. ; Coralline Oolite (Prestwich's Geology) ... 109 



, 166. — Corals of the U. Chalk sea : «, Synhelia Sharpeana, M. Edw. ; 

 b, Stephanophyllia 30werb«nkii, M. Edw. ; c, Farasmilia 

 centralis, Mant. (Prestwich's Geology) 110 



, 167. — a, Turbinolia Bixoni, Edw. and H, ; A, DendrephylUa dmdro- 

 phylloides, Lonsd. ; c, Litkar^e^a WebsUri, Bow. M. Eocene : 

 Bracklesham. (Prestwich's Geology.) 110 



, 168. — Different forms of siliceous spicules of fossil monactinellid 



sponges 116 



169. — Various forms of siliceous spicules of fossil tetractinellid sponges 116! 



, 170.— Different forms of siliceous spicules of fossil iithistid sponges ... 117 



171. — Different forms of skdetal and demml spiwiles of fossil iithistid 



sponges 118 



172. — Spicules and fragments of spicalar mesh of fossil hexactinellid 



sponges ... ... ... ... ... ... ... ... 119 



173. — Different forms of siliceous heteractinellid and multiaxial spicules 



and also spicules of fossil calcisponges 121 



174. — Feronidella pistilliformis, Lamx. ; Great Oolite, Hampton Cliff, 



near Bath 124 



175. — Hallirhoa costata, Lamx. ; U. Greeasaad, Warminst« ... ... 125 



, 176, — Siphmia tulipa, Zittel; U. GreensMd, "Warminster, Wilts ... 126 



177. — Boryderma dichotoma; XJ. Greensand, Warminster, "Wilts ... 126 



17S.—Verrucnlina Beussii, M'Coy; U. Chalk, Flamhoroagh H«ad ... 127 



179. — Ventriculites infundibuliformts, S. Woodw. ; U. Chalk 127 



180. — Fossil Eadiolaria 129 



, 181. — ^Types of Foraminifera ... 132 



, IS'I.—Xi'ummulma num}nula4-ia, D'Orb. ; Eocene , 1-34 



