92 HELIX. 



H. ASSIMILIS, Garrett. PL 18, fig. 84. 



Moderately umbilicated, rather solid, subpellucid, finely ob- 

 liquely striate, greenish horn color with two narrow chestnut bands, 

 .suture with a narrow pale margin; whorls 52 6, upper ones con- 

 vex, lower ones subplanulate, narrow, slowly increasing, last one 

 with compressed, rugose peripheral carina. Diam. 15 mill. 



Huahine, Society Islands. 



Smaller with more flattened whorls and more excavated umbilical 

 region than H. pallens ; the bands always narrow, and differing in 

 color. The obliquely arched columella will separate it from H. 

 troehiformis. 



H. LATIMARGINATA, Smith. PI. 18, figs. 81-83. 



Deeply, narrowly umbilicated, dull pale brownish ; whorls 5, 

 .slowly increasing, the last broadly marginate above the suture, with 

 oblique growth-lines, periphery sharply carinated. Diam. 15 mill. 



Viti Islands. 



H. TAVINNIENSIS, Garrett. PL 18, fig. 85. 



Rather widely perspectively umbilicated, somewhat thin, sub- 

 pellucid, a little shining, obliquely striated ; brownish yellow, with 

 narrow chestnut bands above and below, suture white-margined, 

 carina white ; whorls 5, the last not descending, acutely carinated. 



Diam. 17 mill. 



Tavinni IsL, Viti Group. 



H. TROILUS, Gould. PL 18, figs. 89, 90. 



Rather widely umbilicated, solid, closely rugosely striated, shining, 

 chestnut-fulvous or yellowish, bifasciate with chestnut, suture mar- 

 gined ; whorls 5?, convex, moderately increasing, the last not 

 descending, base slightly convex, with slight spiral lines ; aperture 

 pearly within. 



Ins. Samoa. 



H. LUDERSI, Pfr. 



Rather narrowly umbilicated, somewhat thin, obliquely striulate, 

 corneous white, with narrow, equal, chestnut bands, suture white- 

 margined ; whorls 5 J, scarcely convex, slowly increasing, the last 

 not descending, periphery with an acute white carina, base slightly 

 convex, shining. Diam. 19 mill. 



Ins. Ovalan, Viti Group. 



