viii. a, 4 Smith: Fossil Invertebrate Fauna 269 



spiral coils. The oldest Cerithium occurs in the Alpine Trias. 

 The principal development is in the Eocene. (Zittel.) 



Cerithium (Campanile) sp. Plate VI, fig. 5. 



Cf. P. Oppenheim, Die Eocanfauna des Monte Postale bei Bolea im 

 Veronesichen, Paleontographica, 43, PI. XVI. 



The fragment figured here is not exactly comparable to any- 

 thing I have seen in any of the collections of Leiden or London, 

 but is not greatly unlike some of the big campaniles of the 

 Edward's Eocene collection in the British Museum. It is also 

 like C. vicentinum Bay, or it might be compared with Pyrazisinus 

 haitiensis Dall. 



There is only one specimen in the Bureau of Science collection. 

 There is a form, Cerithium nodulosum, living to-day in Philippine 

 waters which is closely related to this fossil species, but in each 

 of these species there is to be noted a little different alignment 

 of tubercles or some other minor differences. If the specimen 

 were more perfect I might venture to place it in some particular 

 species, but for the present I shall be content with simply giving 

 a figure of it. 



Locality: Mount Mangilao, Danao, Cebu, No. 272. 



Formation : Miocene limestone. 



Potamides Brongniart 



Shell turreted, with brown epidermis ; mouth opening forward 

 with weak canal or only a small conduit; operculum circular, 

 multispiral. Brackish or fresh- water forms. (Zittel.) 



Cerithium (Potamides) palustris Linn. Plate VI, fig. 9. 

 Martin, Fogs. v. Java, PI. XXXII, fig. 478. 



This species inhabits only brackish water. The specimen 

 figured here is smaller and more poorly preserved than the Javan 

 specimens, but there can be little doubt that they are all the 

 same species. 



Other species in the Philippine collection are P. noetlingi K. 

 Mart, P. babylonicus (?) K. Mart, and P. herklotsi K. Mart. 

 Potamides palustris and P. herklotsi were found in coal measure 

 shales with Vicarya callosa in the Tumaga River, near Zam- 

 boanga, Mindanao. 



Formation: Miocene shale. 



