PLATE XV. 

 Fig. 



1 a. Nerincsa (.■^ Ptygmatis) Ouisei, Witchell. 1 c. Section of another specimen, 



both from the Clypeus-gvM of Rodborough. 1 h. The same. Figure 

 made up of two specimens from Parlchiftoni-zone of Clan Down, near 

 Radstock. My Collection. (Page 213.) 



2 a. Flycjmatis campana, sp. nov. Lincolnshire Limestone, Belmisthorpe. 2 b. 



Section of a fragment from same place. My Collection. (Page 214.) 



3 a. Ptyy inatis pisolitica, Witchell. Pea-grit, Longfords. 3 b. The same, showing 



apical conditions. Pea-grit, Crickley. 3 c. The same. Fragment of 

 adult shell, with section. Pea-grit, Longfords. My Collection. (Page 

 215.) 



4 a. Phjgmatis xenos, sp. nov., fig. x 2. 4 ^, The same. Section of a fragment, 



natural size. Shell-bed below Lower Limestone, Crickley. My Collec- 

 tion. (Page 216.) 



5 a. Plygmatis bacillus, D'Orbigny. Figure composed of two squeezes, the apical 



portion from Red Post Quarry, the other from Carnicot ; both from 

 the Parkmsoni-zone of the Radstock District. 5 b. The same. Section 

 of partly dissolved shell fragment. Carnicot, x 2^. My Collection. 

 (Page 217.) 



6 a. Ptygmatis bacillus, var. cervicula. Little Ponton cutting (upper Nerinaa-hed). 



6 b. The same. L. L., Weldon. 6 c. Section of ? same species, top 

 of Freestones, Crickley, x fi. My Collection. (Page 218.) 



7 a. Ptygmatis bacillus, var. crassicincta. Pea-grit, Nails worth Hill. 7 b. Section 



of same specimen. My Collection. (Page 218.) 



8 a. Ptygmatis " bacil hides. ^^ Lincolnshire Limestone, Wakerly. 8 b. Section of 



same specimen. My Collection. (Page 219.) 



9 a. Ptygmatis Jonesii, Lycett; type refigured. "Freestone, Nails worth." 



Jermyn Street Museum. 9 b. The same. Fragment of lower portion. 

 Pea-grit, Longfords. My Collection. 9 c. ? The same, showing sub- 

 apical conditions. Upper Pisolite of Longfords. My Collection. 

 (Page 218.) 



10 a. Ptygmatis jjroducta, Witchell, with section. 10 b. The same, showing 



earlier conditions. Both from Pea-grit of Longfords. My Collection. 

 10 c. The same ; type refigured. Pea-grit, Longfords. Witchell 

 Collection. (Page 220.) 



11 a. Ptygmatis Oppelensis, Lycett. Oolite Marl, Selsley. Witchell Collection. 



lib. The same. Oolite Marl, Swift's Hill. 11 c. Section of the above. 

 lid. The same. Pea-grit, Longfords. My Collection, lie. Section 

 of specimen from Swift's Hill. Witchell Collection. (Page 219.) 



