HELICINA $. 6. 251 
Helicina  Mangoensis G. .B. Sowerby in Proc. Zool. Soc. 1870. p. 250 *). 
Habitat Mango-Island insularum Feejee (Gráffe, Sowerby). 
50. H. plicatilis Mousson. 
.I. depresso-conica, striatula, nitidiuscula, flavido-albes- 
cens. Spira depresso-conica, celeriter accrescens; summo 
minuto, nitido, subprominulo; sutura superficiali, subirregulari. 
Anfr. 4!/, primi convexi, sequentes plani, ad Butüram sub- 
appressi; ultimus non descendens, latus, acute angulatus, supra 
spiraliter obscure impressus, subtus convexior, inflato-conicus. 
Apert. oblique triangularis, 2/, altit. aequans. Perist. rectum, 
acutum; margine supero antice paulo arcuato; laterali obliquo 
cum columellari angulatim juncto; hoe tenui, in area triangu- 
lari late reflexo, infra quasi cristato, extus. plicaeformi; lamina 
eallosa parietali expansa, subeirculari. — Diam. maj. 11, min. 9, 
alt. 3 mill. — Rat. anfr. 2:1. — Rat. apert. 5:06.* (M.) 
Helicina plicatilis Mouss. in Journ. Coneh. XIII. 1865. p. 178; XVII. 
1869. p. 358. 
-— —  . Jrasz. in Proc. Zool. Soc. 1871. p. 322. (Synon. H. Nor- 
folkensis Pfr.) 
- Pütel Catal. p. 126. 
Habitat i in insulis Upolu et Savai (Gráffe). 
* 
51. rudis Pfr. II. 190. III. 220. — Habitat? 
52. Shanghaiensis Pfr. II. 190. III. 220, — Shanghai Chinae. 
53. Sandwichiensis Soul. (Coll. 25.) II. 190, III. 220. — Ins. Sandwich. 
54. H. Pfeifferiana Arango. 
T. conica, tenuis, rugulosa, plerumque incrustata, haud 
nitens, VORROERES spira conica, acuta; anfr. 5 angulati, ultimus 
carinatus, basi VS tenui, nitido obductus; apertura diagonalis, 
late lunaris; perist. simplex, rectum, margine basali arcu levi 
in columellam brevissimam continuato. — Diam. maj. 3, alt. 
21/, mill. (Coll. Nr. 26.) 
*) ,H. testa pallide lutea, supra aurantia, trochaeformi; anfractibus 
convexis, infra medium carinatis, supra carinam spiraliter liratis, infra cari- 
nam subplanulatis, laeviusculis; carina lata, declivi, subtus vix crenulata: 
apice obtuso; apertura trigona; margine basali convexiusculo. (Dimensiones 
desiderantur.) — Species similis 77. Josephinae, sed superne multo con- 
vexior.* (S.) 
