﻿PLATE XXXVIII. 



Fig. 



1- Trigonia Cymba, Cont. (Mould). Portland Sand, Dorset. (Page 19.2.) 



Coll. Col. J. C. Mansel-Pleydell. 



2. „ eocallata, Lyc. Middle Neocomian formation, Norfolk. (Page 



184.) Coll. British Museum. 



3. „ Alina, Cont. Portland Limestone, Shotover Hill. (Page 



193.) See also PI. IX, fig. 2 ; there mentioned as 

 a variety of T. incurva. Coll. Museum, Oxon. 



4. „ compta, Lyc. Slate of Colly weston. Specimen unusually 



large, having the posteal terminal tubercle of each 

 costa much developed. See also PI. XV, figs. 5, 

 0, 7. (Page 70.) Coll. S. Sharp, Esq. 



6. ., iscapha, Ag. Middle Neocomian formation, Norfolk. (Page 



183.) Woodvvardian Museum, Cambridge. 



7. IFilliamsoni, Lyc. Kelloway Rock, Scarborough. See also 



PI. XVI, fig. S. (Page 53.) My collection. 



8. 9. „ Wilchdli, Lyc. Fullers' Earth, Stroud. (Page 197.) Coll. 



E. Witchell, Esq. 



10, 11, 1.2, 12tz. „ ptdchellu, Ag. Upper Lias, Lincoln. (Page 185.) My col- 

 lection. 



