TORNATELLIDES, HAWAIIAN ISLANDS. 



203 



\ Adult shells less than 2.7 mm. in length. 



c. Adult shells rather narrowly ovate-conic, dia- 

 meter 56 per cent or less of the length, which 

 is about 2.5 mm. 



d. Outlines of spire slightly convex; parie- 

 tal lamella very low in the adult stage ; 

 Hawaii. T. confusus, no. 15. 



d\ Outlines of spire straight; parietal la- 

 mella moderate ; Laysan I. 



T. bryani, no. 15%. 



c 1 . Adult shells broadly ovate, diameter 56-65 per 

 cent of the length. T. compactus, no. 10. 



D arietal lamella of adults moderately or well developed, 

 more than 0.10 mm. in height. 



6. Parietal lamella of adults moderately developed less 

 than 0.15 mm. in height. 

 c. Shell conic. 



d. Umbilicus rather ample. 



T. subangulatus, no. 18. 

 d 1 . Umbilicus smaller, aperture wider. 



T. inornatus, no. 20. 

 c 1 . Shell oblong-conic, aperture ovate. 



d. 3.5 x 2 mm. T. procerulus, no. 11. 



d 1 . Smaller and narrower, parietal lamella 

 larger. T. kamaloensis, no. 12. 



& 1 . Parietal lamella strongly developed, more than 0,17 

 mm. in height, apex blunt. T. oncospira, no. 19. 



TORNATELLINA viTBEA. ' ' T. vitrea Pease I find nowhere 

 described. It is closely related to T. newcombi Pfr., but is 

 smaller, more ovate ; the 6 whorls are convex, the last rounded 

 on the base. The umbilicus is narrower. The lamella on the 

 parietal wall is small, and the columella is cylindrical and 

 without folds. Sandwich'' (Dohrn) . 



Cionella (Tornatellina) vitrea Pease, PAETEL, Catalog, p. 

 107 (name only). Tornatellina vitrea Pease, DOHRN, Mala.k. 

 Bl. x, 1863, p. 162. 



From the above descriptive notes, T. vitrea must be a 



