178 HELIX 8. 38a. 
convexis, ultimo convexiusculo, peripheria subcarinata; aper- 
tura valde obliqua, elliptico -lunata; peristomate tenui, acuto, 
marginibus conniventibus, callo tenui junctis. — Diam. maj. 6, 
min. 5, alt. 41*/5 mill.» (B.) 
Helio hyptiocyclos Bens. in Ann. and Mag. n. h. (Febr. 1863.) 
3d. ser. XL..:p.: 89; 
Habitat prope «Fort M'Donald » insulae Ceylon (Layard). 
949. H. subangulata Adams et Angas. 4| 
«H. testa orbiculato-conoidali, pertenui, pellucida, vitrea, 
pallide straminea, anguste umbilieata; anfractibus planis, tenuis- 
sime concentrice striatis, ultimo ad peripheriam subangulato; 
apertura perobliqua, lunato-ovali, latiore quam longa; labio 
acuto, breviter reflexo, umbilicum vix tegente. — Long. !/, 
lat. 3 lin.» (À) 
Helix (Thalassia) subangulata. Ad. et Ang. in Proc. Zool. Soc. 
| 1863, p. 5231. 
Habitat in Australia meridionali. 
950. H. Baladensis Souverbic. j 
«T. umbilicata, depressa, subdiscoidea, tenuissima, stria- 
tula, nitida, translucida, pallide straminea, fulvo lineolata, lineo- 
lis infra suturam dilatatis et radiatim dispositis, postea subito 
attenuatis, antice curvatis et perobliquissime descendentibus, 
prope umbilicum evanidis; spira brevissima, vix emersa; anfr. 
3!/ convexiusculi, subrapide accrescentes, sutura impressa 
separati; ultimus non descendens, subcompressus, obtuse sub- 
 carinatus, circa umbilicum mediocrem subinfundibuliter con- 
cavus; apert. obliqua, subampla, subovali-rotundata; perist. 
simplex, rectum, marginibus distantibus, callo tenuissimo junc- 
tis, supero antrorsum subarcuato, columellari ad insertionem 
vix incrassato, circa perforationem breviter reflexo. — Diam. 
maj. 5, min. 4!/, alt. 2! mill.» (S.) 
Helio taeniata Montrouz. in sched. Nec Webb et Berth. etc. 
— Baladensis Souv. in Journ. Conch. XI. 1863. p. 276. 
£742: E Y. 
Habitat Balade Novae Caledoniae. 
951. H. Browningii Benson. 4| 
«H. testa anguste umbilicata, conoideo - depressa, tenui, 
superne et subtus prope carinam solum plicis albidis confer- 
tim oblique plicata, versus umbilicum laevigata, albido - cornea, 
strigis obliquis rufis superne subtusque oblique ornata; spira 
