Helix declivis, Newc.
Hel. testa perspectivo-umbilicata, lenticulare, oblique striata, tenue, pallide-cornea; anfr. IV, planulatis, ultimo declivi, in medio sub-carinato; sutura sub-canuliculata; peris. fragile, simplici: apertura obliquo-sub-rotundata.
Alt. ·1 pol., Diam. maj. ·3 pol., min. ·2 pol.
Hab. Insula Niphon, (Japan).
Shell perspectively umbilicate, lenticular, obliquely striate, thin, pale horn color; whorls four, planulate, the last shelving down to the centre, which is obscurely keeled; suture channelled; lip fragile, simple; aperture oblique, almost round.
Remarks.—Bears some resemblance to H. ruderata, Stud., a species common in Europe, from which it may readily be distinguished by comparison.
Note.—The Japanese species herein described, were collected by Professor Blake, in the interior of the Island of Niphon, out of the range permitted to foreign travel.
The Professor, who was employed by the Japanese Government as a special geologist, had the privilege of penetrating districts not before visited by any scientific or mercantile foreigner. The following species of Helices were also among those collected:
- Helix peliomphala, Pfr., (Mon. Hel. viv. Vol. 4, Sp. 1764).
- H. quesita, Deshayes, (Reeve’s Mon. fig. 1355).
- H. Perryi, Jay, (Perry’s Exped. Vol. 2, page 294, Plate 5, fig. 7, 8, 9).
- H. Simoda, Jay, (do. fig. 1 to 6).
Some doubt may exist as to the H. quesita being identical with H. Perryi. But one specimen was preserved, and this fully agrees with the description and figure of the first named, but the locality for the species is given as the “Moluccas.”