COCHLOSTYLA OF MINDORO PROVINCE 



449 



half of the last turn by fine spiral striatums. The postnuclear whorls 

 are moderately rounded, appressed at the summit, and marked by 

 very fine retractively curved incremental lines and closely spaced 

 microscopic spiral striations, which are present on both spire and base. 

 The suture is moderately constricted; the periphery with an obsolete 

 angle. The base is moderately long, somewhat inflated, and strongly 

 rounded. The aperture is subcircular with the outer lip slightly 

 expanded and reflected, and the columella is gently curved and rather 

 narrow and without fold or tooth at the anterior end. The columellar 

 wall and parietal wall are covered with a thin translucent callus. 



The specimen described and figured (U.S.N.M. no. 309451) has 

 5.5 whorls and measures: Length, 34.6 mm; greater diameter, 24.2 

 mm; lesser diameter, 21.6 mm. It is from Mindoro, without specific 

 locality. 



Additional specimens yield the following data: 



This species recalls Cochlostyla (Eudoxus) jonasi, but that is much 

 stouter and has the columella toothed or notched at the anterior end. 



COCHLOSTYLA (EUDOXUS) SIMPLEX (Jonas) 



Plate 101, Figure 6 



1843. Bulimus simplex Jonas, Proc. Zool. Soc. London, 1842, p. 189. 



1843. Bulimus simplex Philippi, Abbildungen und Beschreibungen neuer oder 



wenig gekannter Conchylien, vol. 1, p. 53, pi. Bulimus 1, fig. 2. 

 1848. Bulimus simplex Pfeiffer, Monographia heliceorum viventium, vol. 2, 



p. 11. 

 1848. Bulimus simplex Reeve, Conchologia iconica, pi. 12, fig. 63. 

 1850. Eudoxus simplex Albers, Die Heliceen, ed. 1, p. 137. 

 1853. Bulimus simplex Pfeiffer, Monographia heliceorum viventium, vol. 3, 



p. 300. 



1185—38 6 



