47 
12. Artemon decussatus Pilsbry. 
Testa depresse turbinata, anguste umbilicata, umbilico profnndo subcylindrico, 1 I 9 — 1 I 10 diaraetri ad- 
aequante, solidula, pallide lutescens, vitracea, supra confertim subtiliterque costellata, costellis circiter S in 
spatio millimetri, lineis spiralibns subtilissimis in interstitio inconspicuia decussati; spira depresse coniea late- 
ribns vii convexiusculis ; apex costnlatns. Anfractns 6 ] / 2 , primi lente, seqnentes rapidius aecresoentes, nltimns 
obsolete angulatns, infra conrexos, circa umbilicum angnlatus. Apertura rhomboidea, snbobliqna, ad angalum 
peripbericum nec non ad basin columellae angulata; peristoma rectnm, haud expansum, margine columellari 
verticali, supra dilatato, supra umbilicum reflexo. 
Diam. maj, 22, min. 20, alt. 16, lat. apert. 12, alt. 11 mm. 
Streptaxis decussatus Pilsbry, in - : Pr. Acad. Philadelphia, 1897 p. 479. 
Brasilien. 
