HELICINA $&. 4. 353 
simplex, rectum, acutum, margine basali cum columella angu- 
lum subrectum formante. — Operc. tenue, corneum. — Diam. 
maj. 4, min. 3'/,, alt..2'/, mill. (Coll. Nr. 35.) 
Helicina laciniosa Migh. in Proc. Bost. Soc, 1845. p. 19. *) 
— -— Gould Exped. shells 1851. p. 99. f. 108. 
Habitat in insula Oahu. 
31. H. vestita Guilding. 7 594 
T. globosa, tenuis, concentrice lyrata, parva; apertura 
semilunaris; labium externum tenue. (Sow.) — Diam. et altit. 
circa 2 mill. (Ex ic.) 
Helicina vestita Guild. in Sow, 'Thes. N. 71. p. 14. t. 1. f. 42. 
Habitat in America boreali. 
32. Hi. margaritaeea Kessom.:T 595 
T. globulosa, vitrea, fragilis, lutescenti-albida, pellucidis- 
sima; spira convexiuseula; apertura hemisphaerica;  perist. 
tenuissimum , simplex, margine .columellari subimpresso. — 
Iam. 2; "alt. Bus. CD.) 
Helicina margaritacea Less. Voy. de la Coquille p. 350. 
Habitat in Nova Guinea. 
33. NE. exigua EPfr. 596 
T. minutssima, conica, tenuis, subtillisime punctato- 
striatula, pellucida, pallide cornea; spira conica, obtusiuscula; 
anfr. 5 perconvexi, ultimus obsolete angulatus, basi planius- 
culus; apertura obliqua, lunaris; columella breviter recedens, 
callum exiguum emittens; perist. simplex, tenue. — Diam. 
21!/, alt. 2 mill. (Mus. Cuming.) 
Helicina exigua Pfr. in Proc. Zool. Soc. 1848. p. 121. 
Habitat Honduras. (Dyson). 
31. H. multieo!or Gould. 597 
T. parva, solidula, conico-globosa, tenuissime striata, 
*) Shell orbicular, convex, reddish brown, interspersed with irregular 
light spots; whorls 5, more or less flattened, with 2— 3 raised lines, revolv- 
ing over the middle of the outer whorl; aperture semilunar; lip simple, 
acute. — Diam. $/, inch. (Migh. l. c.) 
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