393 



Costa Rica Miocene — Olsson 



121 



Phos SUbsemicostatus Brown and Pilsbry Plate 9, figure 15 



Phos SUbsemicostatus Brown and Pilsbry, 191 1, Proc. Acad. Nat. Sci. 

 Phila., vol, 63, p. 350, pi. 25, fig. 3. 



A larger and finer sculptured species than the Dominican 

 Phos semicostatus of Gabb. A single imperfect specimen was col- 

 lected from Zone E of Saury Creek. 



Gatun Stage: Gatun {Brown and Pilsbry) 

 Zone E, Saury Creek, C. P. 



Phos Veatchi, n. sp. Plate 9, figures 2, 3 



Shell large and heavy, with a moderately long, coarse spire 

 of about 9 whorls; nucleus small, of 2 smooth whorls; whorls of 

 the spire moderately convex, with strong ribs continuous from 

 suture to suture; sutures appressed and bordered below by a 

 small spiral; the last whorl is widest about the middle and con- 

 tracted below to the short anterior canal; sculpture of heavy, 

 persistent ribs and regular raised spirals; the last whorl has 8 

 ribs; the spirals consists of raised threads, separated by wide, in- 

 terspaces; an occasional secondary spiral will appear in the in- 

 terspace but they are generally smooth or only obsoletely sculp- 

 tured by the growth lines; there are 8 spirals on the spire-whorls, 

 16 or 17 on the last whorl; aperture ovate, with the outer lip 

 thickened by the last rib, and internally with 9, long, entering 

 lirse; inner lip formed by a raised, spreading callus, armed above 

 by a tooth-like denticle and a strong fold below on the edge of 

 the canal. 



Length 43, diameter 22, last whorl 28, spire 25 mm. 



A large, robust species from Hill la of the Banana River. It 

 differs from the suhsemicostata by its strong persistent ribs and 

 coarser spirals. 



It is named for Dr. A. C. Veatch, Director of the Explora- 

 tion work of the Sinclair Oil Corporation, under whose direction 

 the Costa Rican collections were made. 



