302 PROCEEDINGS OF THE ACADEMY OF [Nov., 



Spaced brown axial lines on a pale ground ; ribs extending from 

 suture to suture as far down as the penult whorl; 38 x 6.4 mm. 



T. lanceata oahuensis n. subsp. 



White bands at suture and below periphery, a broad band of 

 brown streaks or blotches above periphery, a narrow one at 

 the base, apex purplish ; ribs very fine, retracted at suture 4 



4. 20 X 5 mm.; Honolulu T. medipacifica n. sp. 



28 X 7 mm.; Kaneohe Bay T. m. melior, n. subsp. 



5. Presutural band defined by a series of transverse pits or punc- 



tures 6 



Presutural band defined by a groove, at least on the upper half 



of the shell 10 



0. Ribs and intervals smooth 7 



Intercostal intervals below the presutural band transversely 



grooved 21 



7. Inner lip callous and raised; ribs strong 9 



Inner lip not raised 8 



8. Ribs straight, strong and subangular; brownish (fading to pink- 



ish), paler below the suture T. clappi n. sp. 



Ribs low; whitish, or with a dull purplish band. Marked with 

 flexuous axial brown lines T. venosa Hinds. 



9. A series of dark spots below the suture T. lauta Pse. 



Color nearly uniform T. nitida Hinds. 



10. Whorls flat; no sculpture except the groove 11 



Whorls having other sculpture 12 



11. 60 to 75 mm. long; maculate T. chlorata Lam. 



30 to 35 mm. long; pale fleshy T. sujfusa Pse. 



12. Without spiral sculpture below the presutural groove 13 



Having spiral sculpture below presutural groove 17 



13. Presutural band nodular, the later whorls elsewhere nearly 



smooth; large; with a few series of dark dots T. crenulata (L.). 



Presutural band with numerous ribs 14 



14. Last whorl nearly smooth below the band, with 4 rows of faint 



spots on a whitish ground; earlier whorls ribbed; whorls 

 shorter, less oblique than in T. argus. 40 x 8 mm., 12 whorls. 



T. argus hrachygyra n. subsp. 

 All whorls ribbed 15 



15. Inner lip not callous; length 60 to over 70 mm 16 



Inner lip callous throughout; whitish with fleshy intercostal in- 

 tervals and three faint gray spiral lines on last whorl; peris- 

 tome retracted above a point at termination of sulcus. Simi- 

 lar to T. cerithina Lam., but costate throughout. 29.5 x 6.9 

 mm., 12 whorls : T. spaldingi n. sp. 



16. Diameter contained about 4f times in length; maculate. 



T. gouldii Desh. 

 Diameter about 4| times in length; no distinct pattern of color; 

 last whorl much more convex and more contracted below 

 than T. gouldii; 60x13.5, aperture 14 mm., 12 whorls re- 

 maining T. thaanumi n. sp. 



