150 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Se». 



Tuxpam seem to be specifically distinct from those of the San 

 Rafael, corals are much scarcer and there is no such number 

 or variety of foraminifera as in the lower beds. 



The following list of fossils of the Tuxpam stage is from 

 the report of Dickerson & Kew : 



Echinoderms : 



Agassizia clevei Cotteau 

 Cidaris cf. loveni Cotteau 

 Clypeaster cubensis Cotteau 

 Macropneustes antillarum Cotteau 

 Metalia cumminsi Dickerson & Kew 

 Scutella cazonesensis Dickerson & Kew 

 Molluscs : 



Astarte, sp. 



Area, sp. 



Antigona glyptoconcha Dall 



Cardium, sp. 



" gatunense Toula 

 " lingua-leonis Guppy 

 dementia cf. dariena Conrad 

 Chione cf. ballista Dall 

 Glycimeris, sp. 

 Meretrix, sp. 

 Mya, sp. 

 Macoma ? sp. 

 Ostrea haitiensis Sowerby 



" trigonalis Conrad 



" sp. 

 Paphia, sp. 

 Panope, sp. 

 Pecten gatunensis Toula 



" cf. " 



" condylomatus Dall. 



" levicostatus Toula 



" sp. 

 Tellina 



Architectonica, sp. 

 Amphissa, sp. 

 Conus interstinctus Guppy 

 sp. 



