58 CATALOGUE OF PHANEROPNEUMONA. 
gray; spire convexly conoidal, with the apex pointed; suture 
middle; whorls 5, scarcely convex, the last one descending, 
rounded, compressed beneath round the narrow umbilicus ; aper- 
ture oblique, nearly circular; peristome rather continuous, 
shortly affixed, simple, straight. Operc. horny, obsoletely spiral, 
concave externally, convex and shining internally. Height 9, 
greatest breadth 103, least br. 10 mill. 
Cyclostoma plicatum, Gould, in Proc. Bost. Soc. 1847, p. 204; Ex- 
ped. Shells, p. 38; ed. 1851, p. 103, f. 118; Pfr. Jc. n. 302, t. 40, 
f. 13,14. Not Vernewzt. 
Cyclostoma Apia, Lécluz, in Journ. Conch. 1851, ii. p. 218, t. 6, 
f.10, 11. 
Cyclostoma pulverulentum, Philippi in litt. 
Cyclophorus plicatus, Pfr. Consp. n. 114. 
Cyclophorus Apis, Pfr. Pneum. Mon. p. 83. 
Hab. Pacific Islands, Upolu. 
52. CYcLOPHORUS STRIGATUS. 
Shell conoidally semiglobular, rather solid, sculptured with sharp 
concentric ridges, opaque, greenish or reddish white; spire 
convex-conoidal, rather pointed ; suture deep ; whorls 5, little 
convex, the last one receding, slightly striate beneath, rather 
flat, slightly keeled round the rather wide umbilicus ; aperture 
oblique, circular ; peristome simple, continuous, shortly affixed, 
straight, blunt. Operc.? Height 8, greatest breadth 12, least 
br. 102 mill. 
Cyclostoma strigatum, Gould, in Proc. Bost. Soc. 1847, p. 204 ; 
Exped. Shells, p. 38, ed. 1851, p. 102, f. 117; Pfr. Ic. n. 303, 
t. 40, f. 15, 16. 
Cyclophorus strigatus, Pfr. Consp. n. 115; Pnewm. Mon. p. 83. 
Hab. Upolu. 
53. CYCLOPHORUS TIARA. 
Shell solid, turbinate, rough, distorted, dirty-whitish, widely um- 
bilicated ; whorls 5, loose, rounded, with spiral ridges ; upper 
whorls waved and closely decussated between the ridges by the 
strie of growth; aperture circular; peristome simple. Height 
$, breadth 2 inch. (G.) 
Cyclostoma tiara, Gould, in Proc. Bost. Soc. 1847, p. 204 ; Exped. 
Shells, p. 37, ed. 1851, p. 101, f. 116. 
Cyclophorus tiara, Pfr. Consp. n. 116 ; Pneuwm. Mon. p. 84. 
Hab. Upolu. 
54. CycLopHorRus? OBLIGATUS. 
Shell small, thick, nearly globular, ash-gray, narrowly perforate, 
girdled on both sides with equal sharp furrows and slight ribs, 
