HELICINA §. 6. 
251 
Helicina Mangoensis G. B. Sowerby in Proc. Zool. Soc. 1870. p. 250 *). 
Habitat Mango-Island insularumFeejee (Graffe, Sowerby). 
5o. H. plicatilis Wlousson. + 
„T. depresso-conica , striatula, nitidiuscula, flavido-albes- 
cens. Spira depresso - conica , celeriter accrescens ; summo 
minuto, nitido, subprominulo; sutura superficial^ subirregulari. 
Anfr. 41 / 2 , primi convexi, sequentes plani, ad suturam sub- 
appressi; ultimus non descendens, latus, acute angulatus, supra 
spiraliter obscure impressus, subtus convexior, inflato-conicus. 
Apert, oblique triangularis, 2 / 3 altit. aequans. Perist. rectum, 
acutum; margine ’supero antice paulo arcuato; laterali obliquo 
cum columellari angulatim juncto; hoc tenui, in area triangu- 
lari late reflexo, infra quasi cristato, extus plicaeformi; lamina 
callosa parietali expansa, subcirculari. — Diam. maj. 11, min. 9, 
alt. 3 mill. — Rat. anfr. 2:1. — Rat. apert. 5:6.“ (M.) 
Helicina plicatilis Mouss. in Journ. Conch. XIII. 1865. p. 178; XVII. 
1869. p. 358. 
— — Braz. in Proc. Zool. Soc. 1871. p. 322. (Synon. H. Nor- 
follcensis Pjr .) 
— — Patel Catal. p. 126. 
Habitat in insulis Upolu et Savai (Graffe). 
51. rudis Pfr. II. 190. III. 220. — Habitat? 
52. Shanghaiensis Pfr. II. 190. III. 220. — Shanghai Chinae. 
53. S and wi ch i ensis Soul. (Coll. 25.) II. 190. III. 220. — Ins. Sandwich. 
54. H. Pfeifferiana Arango. 
T. conica, tenuis, rugulosa, plerumque incrustata, haud 
nitens, rubicunda; spira conica, acuta; anfr. 5 angulati, ultimus 
carinatus, basi callo tenui, nitido obductus; apertura diagonalis, 
late lunaris; perist. simplex, rectum, margine basali arcu levi 
in columellam brevissimam continuato. — Diam. maj. 3, alt. 
21/2 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 H. Josephinae , sed superne multo con- 
vexior.“ (S.) 
