TRUNCATELLA §. 5. 
19 
55. scalariformis Reeve. (Coll. 28.) Aur. 191. Pneum. II. 8. III. 7. — 
Taheitia scalariformis Pease in Journ. Conch. XIX. 1871. p. 92; 
Proc. Zool. Soc. 1871. p. 468. — Martens Sf Langk. Don. Bismark. 
p. 60. t. 4. f. 1: — Ins. Annaa, Taheiti. 
56. Tr. arctecostata Mousson. f 
„T. rimata, cylindraceo-turrita, subdiaphana, tenuiuscula, 
multicostata, (38 per anfr.), interstitiis costas aequantibus, luteo- 
alba. Spira decollata; sutura impressa. Anfr. 4 — 5 superstites, 
supra magis, infra minus convexi; ultimus ovato-rotundatus, 
infra attenuatus, ad rimam appressus. Apertura verticalis, 
*/ 4 altitudinis aequans, oblique late ovata, biangulosa. Perist. 
tenuiter incrassatum, obtusiusculum; margine dextro expanso, 
subeffuso, infra antrorsum paulo producto; basali ad columellam 
subangulatim adjuncto; columellari et parietali subsoluto-cras- 
siusculis, breviter reflexis. — Altit. 6, diam. 2,5 mill. Rat. 
anfr. 7:2. Rat. apert. 4:3. w (M.) 
Truncatella arctecostata Mouss. in Journ. Conch. XVII. 1869. p. 68. t. 5. 
f. 4. (in tab. acutecostata .) 
— — Patel Catal. p. 117. 
Habitat in insulis „Paumotou u dictis (Garrett). 
Obs. Species — Prune, scalariformis Reeve. ( Pease in Journ. Conch. 
1871. p. 92; Proc. Zool. Soc. 1871. p. 468.) 
57. Tr. Wallaces H. Adams, t ' 
„T. elongata, subulata, tenuis, decollata, albida, clathris 
acutis undulatis confertissime instructa; anfr. superst. 8, con- 
vexiusculi, ultimus penultimo late sejunctus; apertura rotundato- 
lunaris; perist. continuum, subincrassatum , undique reflexius- 
culum, extrorsum expansum. — Long. 18, lat. 4 mill.; ap. 
diam. 3 mill. 44 (A.) 
Truncatella Wallacei fTaheitiaJ II. Adams in Proc. Zool. Soc. 1865. p. 
416. t. 21. f. 13. 14. 
Habitat in insula Waigiou. 
58. Tr. clathrata A. Adams & Angas. + 
„T. t. elongata, subcylindrica , tenui, decollata, pallido- 
fulva, clathris acutis irregularibus subdistantibus instructa; 
anfr. superst. 7, convexiusculi , ultimus penultimo sejunctus; 
apertura subovalis; perist. continuum, undique reflexum, mar- 
gine dextro expanso. — Long. 9, diam. 3 mill., ap. diam. 
3 mill. 44 (A.) 
2 
