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 : 



PI. tenuis. PI- denudatus. PI. triquetrus. 



PI. discoideus. PI- miit'tus- 



pj denudatus pi_ cOStatUS. 



Plate 2, line e, figs. 18-27, line/, 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 shell-sand, and contained the following 

 fossils : 



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



PI. discoideus {rotundatus- Sand). 



like young). PI- 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. 



PI. discoideus. PI. 'dhcMeTs^- 



Plate 2, line m. . • 



Formation " k," Old Pit. 



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

 the foUowmg fossils : 



PI tenuis. Pi- trochiformis. 



PI. discoideus. PI- trochiformis (rotundatus-yonng). 



Plate 2, lines w, o, undp, figs. 1-13. 



Formation " 1," Old Pit. 



This consisted of wMte shell-sand, and contained : 

 PI s/e,-,f;^"ren.«. PI- trochiformis. PI "S^f. 



PL tenuis. PI- trochiformis {wax.pyrgu- PI. denudatus. 



PI. discoideus. Uformis Sand). 



PI. XciSf • Pi- minutiis. PI. 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 



