232 TORNATELLIDES OF HAWAIIAN ISLANDS. 



T. euryomphala, no. 37. 

 f l . Darker; columellar lamellae 

 not visible in a front view. 



T. waianaensis, no. 42. 



d l . Umbilicus minute, less than 0.15 mm. in 

 diameter. T. macroptychia, no. 44. 



c 1 . Whorls loosely coiled, not more than 5%. 

 d. Shells more than 2.7 mm. in length. 



e. Last whorl broadly ovate, aperture 

 long, rather narrow; 2 columellar 

 lamellae emerging. T. bellus, no. 46. 

 c\ Columellar lamellae receding, not 

 visible in a front view of the adult ; 

 3.3 x 1.8 mm., with 5% whorls. 



T. popouelensis, no. 40. 



d l . Shells less than 2.5 mm. in length, last 



whorl ovate, aperture truncate-ovate, 



rather broad. T. virgula, no. 45. 



6 1 . Adult shells over 3.2 mm. long. 



c. Columella showing two lamellae in the adult 

 stage, front view. 



d. 3.8 x 1.65 mm., 7 whorls. 



T. ronaldi, no. 39. 

 d\ 3.4 x 1.9 mm., 5% whorls. 



T. plagioptyx, no. 47. 



c 1 . Columella unarmed or with scarcely noticeable 

 lamellae in front view of adults. 



d. Spire a little convexly conic ; 3.7 x 1.65 



mm., 7 whorls; crest of parietal lamella 



uneven. T. irregularis, no. 38 



d 1 . Spire conic ; 3.3 x 1.8 mm., 5^ whorls. 



T. popouelensis, no. 40. 



37. T. EURYOMPHALA (Ancey). PL 50, figs. 1, 2, 3. 



"Shell turrite, thin, corneous, a little shining, fulvous-cor- 

 neous, having, for the genus, a broad, open and deep umbili- 

 cus. Spire conic, rectilinear. Whorls 6, convex, striatulate, 

 regularly increasing, suture impressed, the last whorl rounded, 



