HELICINID &. 252 
§ 3. Peristome toothless, straight, thickened, blunt; shell keeled. 
18. Henicina MAvGERIzZ. 
Shell depressed, rather lenticular, thick, keeled, nearly smooth, 
yellow-whitish, with two broad red bands; spire short, vaulted, 
slightly mucronate; whorls 43, rather flat, the last more con- 
vex beneath, scarcely descending anteriorly; aperture very 
oblique, narrow, lunate; base of the columella very shortly 
arcuate forward, dilated backward into an extremely thick, pro- 
minent, lemon-yellow callus; peristome thick, straight, pale 
yellowish ; the margins joined by callus; upper margin sinuate ; 
basal margin slightly emarginated near the columella. Height 
7, greatest breadth 12, least br. 10 mill. 
Helicina Maugeriz, Gray, in Zool. Journ. i. p. 251; Zool. of Beech. 
Voy. t. 38, f. 25; Sow. Thes. n. 8, p. 3, t. 2, f.55; Pfr. Lc. n. 14, 
p. 19, t. 6, f. 23,24; Pneum. Mon. p. 348. 
Locality unknown. Named after Mrs. W. Mauger. 
19. Henicina Rowrt. B. M. 
Shell conoidal, thick, faintly striated and foveolate, opaque, scarcely 
shining, straw-coloured-whitish or purplish, with white bands ; 
spire conoidal, rather pointed; whorls 43-5, rather flat, the last 
one turgid above, furnished at the periphery with a sharp, com- 
pressed, prominent keel, deflexed anteriorly, scarcely convex 
beneath; aperture small, oblique, semiovate, higher than broad ; 
columella rather simple, indistinctly tuberculated at its lower 
extremity, dilated backward into a semicircular white callus ; 
peristome straight, sharp, with a thick white internal lip; upper 
margin sinuate. Height 7, greatest breadth 10, least br. 82 mill. 
Helicina Rohri, Pfr. in Proc. Zool. Soc. 1848, p. 124; Je. n. 15, 
p- 20, t. 7, f. 24-27; Pnewm. Mon. p. 348. 
Helicina Marchionissa, Hombr. & Jacq. Voy. Pol. Sud. Moll. t. 11, 
f.13-17% (WNukahiwa). 
Hab. Marquesas Islands (Rohr). 
20. HELICINA MINIATA. 
Shell subglobose, orbiculate, solid, thick, faintly striated above ; 
spire red, convex, depressed ; last whorl thick, slightly keeled, 
whitish ; aperture oblique, triangular ; columella smooth; peri- 
stome simple. Height 3, breadth 5.” (Lesson.) 
Helicina miniata, Lesson, Voy. Coquille, p. 149, t. 13, f.9; Pfr. 
Pneum. Mon. p. 349, ‘ , £9; Pf 
' Hab. The Island Borabora. 
