60 CATALOGUE OF PHANEROPNEUMONA. 
into two obsolete rows; spire short, conoidal, rather pointed ; 
whorls 4, convex, last rounded, marked with two spiral ridges 
round the narrow umbilicus, the outer of which is crenulated, 
and the inner terminates externally in a very conspicuous 
knot ; aperture scarcely oblique, nearly circular; peristome 
thick, blunt, angulated above and on the left side. Operc.? 
Height 6, greatest breadth 8, least br. 7 mill. 
Cyclostoma euomphalum, Philippi, in Z. f. M. 1851, p. 30; Pfr. 
Ic. n. 338, t. 42, f. 27-30. 
Cyclophorus? euomphalus, Pfr. Consp. n. 120; Pnewm. Mon. p. 86. 
Locality unknown. 
58. CycLOPHORUS MARGARITA. 
Shell perforate, globose-conic, rather solid, smooth, slightly shining, 
reddish, amber-coloured ; spire conic, with the apex rather 
pointed, blood-red ; whorls 5, moderately convex, the last one 
rather rounded ; aperture rather oblique, ovate; peristome not 
continuous, simple, straight, with the columellar margin strongly 
arcuate, rather thickened. Height 6, greatest breadth 7, least 
br. 6 mill. 
Cyclostoma margarita, Pfr. in Proc. Z. S, 1851; Jc. n. 235, t. 34, 
£9, 10. 
Cyclophorus ? margarita, Pfr. Consp. n. 121, p. 54; Pneum. Mon. 
p. 86. 
Hab. The Island of Rapa, Pacific Ocean. 
59. CycLopHorus CyTorRa. B. M. 
Shell minute, trochiform, rather solid, brown, closely and uni- 
formly spirally striated, crossed by slight wrinkles ; spire conical, 
nearly as high as broad, with the apex subacute ; whorls 53, 
moderately convex, the last rounded and convex in front ; 
aperture diagonal, nearly circular ; peristome simple, straight, 
thickened internally, with the margins approximate, united by 
a thin callus. Operc. horny, of a few rapidly-enlarging whorls? 
Height 2, breadth 23 mill. 
Cyclophorus Cytora, Gray, in Proc. Z. S. 1849, p. 67 ; Catal. Cycl. 
p. 23, n. 38; Pfr. Consp. n. 77 ; Pneum. Mon. p. 86. 
Hab. New Zealand, Auckland (Greenwood). 
§ 7. Shell depressed, spirally ribbed or striated; peristome expanded. 
60. CycLoPHORUS OCULUS CAPRI. B. M. 
Shell turbinate-depressed, solid, closely spirally striated and 
angulated by 4-5 blunt spiral ridges, marbled above with 
