180 PROCEEDINGS OF THE CALIFORNIA 



Note. — In general form and color, this species makes a nearer approach to H. 

 Candida, Moricand, than to any species with which I am acquainted. It varies 

 in the less elevation, in the form of the spire, and in some other respects. Pro- 

 fessor Blake had remarkable facilities for collecting in Japan, but unfortunately 

 the mice proved s.o destructive to his terrestrial shells, as to leave him but few 

 specimens as the result of his labor. 



Helix declivis, Newc. 



Hel. testa perspectivo-umbilicata, lenticulare, oblique striata, tenue, pallide-cor- 

 nea ; anfr. IV, planulatis, ultimo declivi, in medio sub-carinato ; sutura sub-canu- 

 liculata; peris, fragile, simplici: apertura obliquo-sub-rotuudata. 



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 ob- 

 scurely keele J ; 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 *' Moluc- 

 cas." 



It also agrees (except in colour) with jDr. Jay's description, and also in the 

 very poor figures illustrating the species of H. Perryi. The only question in my 

 mind is one regarding locality. 



Helix Cronkhitei, Newc. 



Hel. testa aperta umbilicata, depressa, luteo-corUea sub-lente regulariter cos- 

 tulato-striata ; spira depressa-convexa ; sutura excavata ; anfractibus quatuor, 

 sub-cylindraceis ; umbilica ampla, sub-perspectiva ; apertura rotundata ; peristo- 

 mate simplici, acuto, marginibus conniventibus. 



Alt. 15 pol., Diam. maj. -2 pol., min. '15 pol. 



Hab. Klamath Valley, Oregon, (Gabb). 



