256 CATALOGUE OF PHANEROPNEUMONA. 
Helicina multicolor, Gould, in Proc. Bost. Soc. 1847, p. 202; 
Exped. Shells, p. 36, ed. 1851, p. 100, f.110; Pfr. Pnewm. Mon. 
p- 353. 
fab. The Island Tonga Tabou. 
35. HELICINA MICRODINA. 
Shell minute, conic, minutely striated transversely, ridged spirally, 
yellow, darker coloured above; whorls 6, convex, the last angu- 
lated; columella arched, callous, and somewhat dilated above; 
aperture oblique, ovate, with the margin simple, straight. 
Height and breadth 4 mill. (J/or.) 
Helicina microdina, Morelet, Test. Noviss. ii. p. 18, n. 124; Pfr. 
Prneum. Mon. p. 354. 
flab. Vera Paz, Guatemala. 
At first sight similar to H. rupestris, Pfr. (JL). 
§ 5. Peristome not toothed, straight, sharp ; shell depressed, not keeled, 
36. HenicINA BERYLLINA. 
Shell rather solid, depressed conic, convex beneath; obtusely 
angulated on the periphery, polished, whitish-green ; spire with 
five rather flattened whorls, last enlarging rapidly; suture 
linear; aperture large, transversely semi-elliptical; peristome 
simple; columellar callus spread broadly. Height 2, breadth 
+ inch. (Gould.) 
Helicina beryllina, Gould, in Proc. Bost. Soc. 1847, p. 202; Exped. 
Shells, p. 37, ed. 1851, p. 95, f. 111; Pfr. Pneum. Mon. p. 354. 
Hab. Feejee Islands. 
37. HELICINA PLATYCHILA. B. M. 
Shell conoidally semiglobose, opaque, moderately shining, smooth, 
greenish-yellow or reddish; spire conic, slightly mucronate; 
suture flat; whorls 55, the upper ones flattened, last more or 
less angulated on the periphery, flattened beneath; aperture 
oblique, rather triangular; columella short, terminating in a 
small knot, which is dilated backward into the basal callus ; 
peristome simple, shortly expanded. Operculum thin, horny. 
Height 63, greatest breadth 10, least br. 9 mill. 
Helix platychilos, Muhlfeldt, in Verhandl. Berl. Ges. i. 4, p. 219, 
$18,411, 
Helicina platichila, Pfr. in Symb. Hist. Helic. ii. p. 95; Ic. n. 22, 
p. 24, t. 4, f. 22-24; Pneum. Mon. p. 354. 
Helicina ‘neritella, Potvez & Mich. Gal. Dowar. i. p. 230, t. 23, 
ie 7,'84 
