88 HYATT ON THE TERTIARY SPECIES 



Formation "f," Old Pit. 



This consisted of the usual quality of white shell-sand, and contained the following 

 fossils : 



PL tenuis. PI. denudatus. PI. triquetrus. 



PI discoideus. PI SS- 



P^. tl™"^- Pi- costatus. 



Plate 2, line e, figs. 18-27, Une/, line g, figs. 1-16. 



Formation "g," Old Pit. 

 This is composed of the common white friable shell-sand, but contained no fossils. 



Formation « h," Old Pit. 



This consisted of the ordinary white, friable sheU-sand, and contained the following 

 fossils : 



PI. discoideus. PI. discoideus (var. elatior^Pl. triquetrus. 



PL discoideus {rotundatus- Sand). 



like young). PL trochiformis. 



Plate 2, line g, figs. 17-23, line h-L 



Formation " i," Old Pit. 



This consisted, where examined, mostly of the debris of broken shells, but contained 

 numerous fossils in good preservation, but very few species. 

 PL discoideus. PL 'SS'- 



Plate 2, line m. 



Formation " k," Old Pit. 



This consists of the common quality of white, friable sheU-sand, and contained 

 the following fossils : 



PL tenuis. PL trochiformis. 



PL discoideus. PL trochiformis {rotundatus-jovng). 



Plate 2, lines n, o, and p, figs. 1-13. 



Formation " 1," Old Pit. 



This consisted of white sheU-sand, and contained : 



JD7 tenuis pj tmoTi^-FnTvn^a T^l denudatus 



■Ti'- Bteinlieimensia- -^ ''• I'l'J^'tlJ U' "Ol'a. JTi. minutus • 



PL tenuis. PL trochiformis {y&r.pyrgu- PL denudatus. 



PL discoideus, liformis Sand). 



PI- rflSSi"- PI- minutus. PL costatus. 



Plate 2, line p, figs. 14-20, and lines q, r, s. 



Formation "x," Old Pit. 

 This has the admixture of broken shells and perfect specimens which is very often 



