PLATE XIII. 



Fig. 



1. Nerinella (B 1). 2. NermeUa (B 2). Lincolnshire Limestone, Weldon. My 



Collection. (Page 198.) 

 3. Nerindea pa7'va, WitcheW. Oolite Marl, Longridge. My Collection. (Page 199.) 

 4 a, 4 &, 4 c. Neringea oolitica, Witcliell. Specimens showing different stages 



of growth. Oolite Marl, Longridge. My Collection. (Page 199.) 



5. Nerinxa Longfordensis, sp. nov. Pea-grit (upper bed), Longfords. My Collec- 



tion. (Page 200.) 



G a. Nerinxa attenuata, Witchell (usual form). Oolite Marl, Longridge. My Col- 

 lection. (Page 201.) 



6 b. Nerinxa expansa, sp. nov. Lincolnshire Limestone, Wakerly. My Collec- 

 tion. (Page 201.) 



6, 7. Nerinxa, varieties of N. oolitica or expansa. Oolite Marl, Longridge. 



My Collection. 



8. Nerinxa deducta, sp. nov. Pea-grit, The Knap. My Collection. (Page 202.) 



9. Nerinxa pseudocylindrica, D'Orb. {fide Lycett). Oolite Marl, Longridge. 



My Collection. (Page 203.) 



10 a. Nerinxa altivoluta, Witchell. Specimen showing the apical condition. 

 Pea-grit (upper bed), Longfords. 10^. The same. Fragment showing 

 aperture. Lincolnshire Limestone, Weldon. 10 c. The same. Section 

 of a fragment. Pea-grit, Crickley. 10 d. The same (in this case the 

 apical ornaments are presumed to have been obliterated). Pea-grit, 

 Longfords. My Collection. (Page 203.) 



11. Nerinxa, fragment of species, ? allied to pseudocylindrica. Lincolnshire 

 Limestone, Weldon. My Collection. (Page 203.) 



