294 EXPEDITION TO JAPAN. 



duabus et viginti rotundatis, elevatiusculis, interstitiis latiusculis, auriculis valvee, sinistra 

 pequalibus, dextra inasqualibus, antica subtus ernarginata. 



Shell orbicular, inequivalve, left valve flatly convex, equilateral, with thirty convexly flat- 

 tened ribs, very broadly and closely concentrically striated, right valve more convex, with 

 twenty-two ribs, rounded, rather raised, interstices rather broad, ears of the left valve equal, 

 of the right unequal, the front one being emarginated below. 



Habitat, Hakodadi. 



This shell grows to a very large size. One in the collection measures seven by eight inches. 



The right valve is used by the natives as a scoop. 



Since the above was written the author has visited the collections of the British Museum and 

 of Mr. H. Cuming, and also those in the museum at Leyden, which were brought from Japan 

 by Mr. Sieboldt, and did not see this shell. 



HELIX SIMOD.E. 



Plate 5, figs. 1, 2, 3. 



Var. figs. 4, 5, 6. 



Testa umbilicata depresso-orbiculari, pallide straminea, striis radiantibus crebris, sculpta spira 

 obtusa, anfractibus quinque, depresso convexciusculis supreme infimo medio fascia castanea 

 ornata, umbilico subperspectivo apertura semi-ovata. 



Shell umbilicated, deprcssly orbicular, pale straw-color, sculptured with close set . radiating 

 stria?, spire obtuse, whorls five, depressly convex, the lowest encircled round the middle with a 

 chestnut band, umbilicus subperspective, aperture semi-ovate. 



Habitat, Simoda, Japan. 



Allied to Helix'profunda, Say, but wanting the tooth. It is very variable. In some speci- 

 mens the peripheric band is not seen, in others it is plainly visible, and in others again the last 

 whorl has another band on its lower surface, witb the umbilicus colored dark brown. 



HEHX PERRYI. 



Plate 5, figs. 1, 8, 9. 



Testa profunde umbilicata, sinistrali depresso — globulosa, intense virente olivacea, anfrac- 

 tibus septem, arcuatim tenui-striata, ad peripheriam pallide fusco-fasciata, umbilico perspectivo, 

 intus fusco-lutescente. 



Shell sinistral, umbilicated, depressly globose, tawny epidermis, whorls seven, regularly 

 striated, with adark band around the last whorl, the interior of the umbilicus dark brown. 



Habitat, Yedo. 



This fine shell is somewhat similar to the Helix cicatricosa Miiller, but differs in the stria? 

 being regular, 'and the color of the umbilicus. 



LYMNEA JAPONICA. 



Plate 5, figs. 10, 11, 12. 



Testa ventricosa, ovata, umbilicata sutura impressa et conspicua, anfractibus quatuor, spira 

 anguste, acuta, breve, apertura inflata. 



Shell ventricose, ovate, suture impressed and conspicuous, wnorls four, spire narrow, acute, 

 and much shorter than the apertuie, aperture very large, more or less expanded, umbilicus not 

 covered. 



Habitat, Simoda. 



