TERTIARY FOSSILS. 3 



NEPTUNEA, Bolten. 



Ckrysodomus, Swains. 

 1ST. RECURVA, n. s. 



^.: PI. 1, Fig. 4. 



SHELL of modeiate size, fusiform; spire elevated, about as long 

 as the mouth; whorls seven or eight (?) rounded on the sides, 

 suture impressed. Surface marked by numerous, regular, rounded 

 revolving ribs, with acute interspaces ; these ribs sometimes show 

 a tendency to alternation in size; the upper whorls sometimes, 

 though not in all specimens, show a few faint longitudinal ribs. 

 Aperture broad in the middle, narrowed in advance ; lips simple ; 

 canal long, narrow, and very strongly recurved. 



Figure, natural size. 



Localities: Abundant in the Miocene at the Arroyo San Antonio, near Tomales 

 Bay. Also found in the same formation at Foxin's Ranch, in Santa Barbara 

 County, on the El Toro Ranch, and near Griswold's, in Monterey County; and in 

 Morgan Valley, Lake County. 



This strongly-marked species seems to be peculiar to the middle and upper por 

 tions of the Miocene formation. 



It is allied to N. (Fusus) exilis, Con., of the Virginia Miocene (see Foss. Tert. 

 Form. pi. 49, fig. 6) ; but the mouth is proportionally larger, the canal is more 

 recurved, and it wants the "longitudinal rounded ribs" of that species. The re 

 volving ribs in this species also are markedly rounded, while in the Eastern shell 

 they are described as acute. 



METULA, H. and A. Adams. 



?M. REMONDII, n. s. 



PL 1, Fig. 5. 



SHELL broadly fusiform, spire elevated; whorls four or five (?) 

 subangulated ; suture impressed. Surface marked by numerous 

 small revolving ribs, rounded with acute interspaces, and more 



