vm, a, 4 Smith: Fossil Invertebrate Fauna 265 



MELANIIDiE 



MELANIA Lamarck 



Shell of various shapes, oval to turret shaped ; smooth, spirally 

 striated, ribbed or having nodes, at times with cross ribs or rolls ; 

 mouth always complete ; columella gradually coalescing with the 

 outer lip. Genus widespread over the earth with the exception 

 of parts of North America. (Zittel.) 



Melania laterita Lea. Plate IV, fig. 9. 



Reeve, Conch. Icon., 12, PI. XXIII, fig. 164. 



Locality: San Rafael, Agusan River, Mindanao. 



Formation : Late Recent or Pleistocene shales. 



Other specimens were collected in the Pasig River, Luzon, from 

 mountain streams on Negros, and by Cuming. Another species 

 occurring with this, but not figured here, is M. denticulata. 



Melania woodwardi K. Mart. Plate VI, fig. 3. 



Martin, Foss. v. Java, 1 , n. s., PI. XXXVI, figs. 267-270. 



This is figured here to show the general likeness between Turri- 

 tella, a marine form, and a fresh-water form. The fresh-water 

 shells are characteristically thinner shelled. 



Locality: Agusan River, Mindanao, No. 1054. 



Formation: Recent. 



NATICIDiE 



NATICA Lamarck 



Shell globose, semiglobose, or ovate; lustrous, rarely spirally 

 striated, umbilicated or not; umbilicus when present, often par- 

 tially or entirely filled with callous material; aperture semi- 

 circular or oval ; outer lip sharp ; inner lip thickened by a callus. 

 Extremely abundant from the Trias on. (Zittel.) 



Fossil species of Natica in the Philippine Islands. 



Natica globosa Chem. 

 Natica marochiensis Gmel. 

 Natica rostalina Jenk. (?) 



Natica globosa Chem. Plate IV, fig. 12. 

 Reeve, Monogr. Ranella, PI. II, fig. 46. 



The specimens of this species in the Philippine collection re- 

 semble the Javan forms very closely, being, perhaps, a trifle more 

 acuminate. 



Locality: Agusan River, Mindanao, No. 1054. 



Formation: Recent shales. 



