HELIX 8. 75. 951 
1669. H. Roratongensis (Pithys) Pease. 41 
« T. orbicularis, umbilicata, tenuiuscula, radiatim tenuissime 
elevato-striata; spira: planulata, sutura bene impressa; antr. 5, 
convexi, ultimus ad peripheriam rotundatus; apertura vix obliqua, 
lamellis 5 munita, 3 in pariete aperturali, 2 in margine basali; 
perist. simplex, rectum; flavido et rufo tessellato-strigata.— Diam.3, 
alt. 19/, mill.» (P.) 
Pills Roratongensis Harper Pease in Crosse Journ. Conch, XVIII. 
18770. p. 395; 
Pilys Roratongensis Pease in Proc. Zool. Soc. 1871. p. 453. 
Habitat in insula Roratonga. 
Obs. «Species affinis H. radiellae Pfr. et consimili Pease.» 
1670. EÉ. analogica (Pithys) Pease. T 
«T. orbicularis, tenuiuscula, late umbilicata, radiatim fle- 
xuoso-eostata, interstitiis obsolete tenuiter striata, flavida, irre- 
gulariter rufo-maeculata aut strigata; spira depresso-elevata, apice 
obtusa; sutura valde impressa; anfr. 7, convexi, ad suturam 
subangulati; anfr. ultimus ad peripheriam rotundatus; apertura 
obliqua, semilunaris, lamellis 5 munita, 3 in pariete aperturali, 
2 in margine basali; perist. simplex, rectum. — Diam. 5, alt. 
3 mill» (P.) 
Pühys analogica Harper Pease in Crosse Journ. Conch. XVIII. 
1870. p. 396. 
Pitys analogica Pease in Proc. Zool. Soc. 1871. p. 454. 
Habitat in insulis « Marquises» dictis. 
1671. H. verecunda (Pithys) Pease. 1 
«T. planorboidea, tenuiuscula, late umbilicata, radiatim te- 
nuiter et conferte elevato-costata, interstitiis striatis; spira pla- 
nulata, depressa; anfr. 6, plano-convexi, ultimus ad peripheriam 
rotundatus; sutura impressa; umbilicus ?/j; diametri occupaus; 
apertura vix obliqua, semilunaris, lamellis 5 munita, 3 in pariete 
aperturali, 2 in margine basali; perist. simplex, acutum; flaves- 
cens, rufo maculata aut [flexuose strigata. — Diam. 5, alt. 
2 mil.» (P.) 
Pithys verecunda Harper Pease in Crosse Journ. Conch. XVIII. 
1870. p. 397. 
Pitys verecunda Pease in Proc. Zool. Soc. 1871. p. 454. 
Habitat in insulis « Marquises» dictis. 
* 
1672. parvidens Pease.'| V.220.— Pitys parvidens Pease in Proc. 
Zool. Soc. 1871. p. 47^. — Taheiti. 
VII. 17 
