Vol. VIII] DUMBLE— GEOLOGY TAMPICO EMBAYMENT AREA 143 



Conus remondii Gabb 



" sauridens Conrad 



" alveatus Conrad 



" sp. 

 Cylichna, sp. 

 Epitonium, sp. 

 Drillia, sp. 

 " sp. 

 Enlima lugubris Lea 



\ sp. 

 Haminea, sp. 

 Galeodea, sp. 

 Lunatia, sp. 

 Mitra, sp. 



Murex migus De Gregorio 

 Neverita cf. secta Gabb 

 Nyctilochus, sp. 

 Natica, sp. 



Olivella near mathewsonii Gabb 

 Ringicula biplicata (Lea) 

 Sinum, sp. 



Siniim striatum (Lea) 

 Surcula, new sp. 



Tritonium, sp. 



Turritella cf. caelutura Conrad 



Turris childreni (Lea) 



" nnpera (Conrad) 



" acutirostra (Conrad) 



" cf. suturalis Cooper 



" cf. monolifera Cooper (Lea ?) 



;; sp. 



cf. mediavia eqtiiseta Harris 

 Cerithium, sp. 

 Schizaster, sp. 



The cuts of the Tampico and Panuco Valley Railroad in the 

 vicinity of the Topila Hills show the Alazan marls underlying 

 sandstones belonging to the San Rafael beds. If the Meson 

 stage is present it has not been recognized. The Alazan marls 

 at this locality carry fragments of a Schizaster and a few small 



