122 



BUI.LBTIN 39 



394 



Gatun Stage: Hill la Banana River. 

 Phos beteyensis, n. sp, Plate 9, figure 6 



Shell of the type of subsemicostata; whorls 3, moderately 

 convex; sculpture with the axial element very weak but present 

 on the penultimate whorl as fine, sub-obsolete, narrow ribs or ir- 

 regular wrinkles on the shell surface; they are absent from the 

 last whorl; the spiral sculpture consists of a broad zone, about 

 the upper 1-3 of the spire whorl on which are irregularly distri- 

 buted about 5 raised spiral threads; below this zone, the sculp- 

 ture is largely in the form of broad uneven bands formed between 

 incised spiral lines; on the last last whorl, this later zone occup- 

 pies the middle of the whorl; the zone of raised spirals above the 

 more smooth area of banded spirals gives to the whorls a slightly 

 coronated appearance. 



Ivcngth 27 (2>^ whorls), diameter 15, last whorl 21 mm. 



The type specimen is very incomplete, but its characters are 

 so distinctive and unlike any other species of Phos which we 

 have seen that its discription is advisable. Like the subsemico st- 

 atus the longitudinal ribs or costae fade out on the later 

 whorls. 



Gatun Stage; Betey Creek, C. R. 

 Phos metuBoides Dall Plate 9, figure 16 



Phos metuloides Dall, 1896, Proc. U. S. Nat. Mus., vol. 19, p. 310, pi. 

 28, fig. 15. 



Phos mettiloides 'Qro'wn and Pilsbry, 191 1, Proc. Acad. Nat. Sci. Phila. , 

 vol. 63, p. 350. 



Phos metuloides Maury, 1917, Bull. Amer. Pal., vol. 5, p. 252, pi. 14, 

 fig. 17. 



A small species with a neat sculpture recalling that of Me- 

 tula cancellata and gabbi. It is not rare in the Gatun beds of 

 Mt. Hope in the Canal Zone. Dall also records it from the Mio- 

 cene of Santo Domingo. 



Length 19, diameter 9, spire whorl 13.5, spire 10 mm. 



Gatun Stage: Mt. Hope. 



