HELIX $8. 77. 201 
perist. simplex, rectum; radiatim fusco et albido tessellata. — 
Diam. 6, alt. 3 mill.» (P.) 
Pilhys? celsa Harper Pease in Crosse Journ. Conch. XVIII. 14870. 
p. 396. 
Endodonta celsa Pease in Proc. Zool. Soc. 1871. p. 455. 
Habitat in insula Raiatea. 
Obs. «Species intermedia inter genera Pithydem et Endodontam. — 
Species Samoénses Endodontae a Cl. Mousson descriptae ad genus Pithy- 
dem typicum pertinent.» 
: " * 
1695. obolus Gould. J- I. 187. III. 145. IV. 456. V. 222. — Patula 
Pütel Cat. p. 93. — Endodonta obolus Pease in Proc. Zool. Soc. 
1874. p. 474. — Taheiti. 
1696. H. decussatula Pease. | 
«T. discoidea, depressa, umbilicata, fusco-castanea et fulvo 
maculose strigata, oblique confertim et arcuatim costata, co- 
stellis volventibus decussata; anír. &—5, convexo-rotundati, 
setigeri; sutura impressa; spira parum elevata; ad peripheriam 
rotundatim obsolete angulata; umbilicus !/j diametri subaequans; 
apertura elliptica, vix obliqua, lamella unica intro volvente in- 
structa. — Diam. 4!4, alt. 2!/, mill.» (P.) 
Heliae decussatula Harper Pease in Tryon Amer. journ. Conch. II. 
1866. p. 291. 
Pitys decussalula Pease in Proc. Zool. Soc. 1871. p. 474. 
Habitat in insulis Sandwich. 
* 
1697. hystrix Mlighels. (Coll. 650.) I. 116. III. 445. IV. 456. V. 222, 
— Heliv setigera Gould. —  Pitys hysiriv Pease in Proc. Zool. 
Soc. 4871. p. 474. — Ins. Sandwich. 
1698. H. paucicostata (Pithys) Pease. T 
« T. discoidea, late umbilicata, tenuiuscula, radiatim oblique 
et remote filo-costata; spira depressa, planulata; sutura bene 
impressa; anfr. 4, convexi, ultimus rotundatus; umbilicus !/ dia- 
metri occupans; apertura vix obliqua, subcirceularis; paries aper- 
turalis lamellis 2 intrantibus munitus; perist. simplex, rectum; 
flavido et rüfo alternatim strigata, strigis flexuosis; epidermide 
tenui induta. — Diam. A, alt. 2 mill.» (P.) 
Pithys paucicostata Harper Pease in Crosse Journ. Conch. XVIII, 
1870. p. 395. 
Pilys filecostata Pease in Proc. Zool. Soc. 1871. p. 454. 
Habitat in insula Kauai. 
Obs. Species peraffinis H. hystrici Migh., costis filiformibus, remotis, 
splendide albis praecipue discrepans. Praeterea minor est et anfractus re- 
&ulariter convexi. 
