496 



PROCEEDINGS OF THE ACADEMY OF [August, 



NOTICES OF NEW LAND SNAILS FROM THE JAPANESE EMPIRE. 

 BY HENRY A. PLLSBRY. 



Continuing his zoological researches in the islands south of 

 Kiusiu, Mr. Hirase has had the two principal islands of the 

 ' ' Northeastern group ' ' of the Loo Choo chain explored for land 

 snails. These islands, Tane-ga-shima and Yaku-no-shima (Yaku- 

 shima), belong politically to the Province of Osumi, and hence in 

 Japan are not ordinarily included in the Loo Choo Islands. I 

 shall discuss their faunal relations more fully at another time, but 

 it may be said here that while there is one species of land snail, 

 Trochomorpha Gouldiana Pils., identical with a species of Oshima, 

 the rest of the fauna, though composed almost wholly of endemic 

 species, is more nearly related to that of Kiusiu than to the Loo 

 Choo fauna proper. 



CYCLOPHORIDJE. 

 Spiropoma Nakadai n. sp. 



Shell discoidal, with very wide, bowl-shaped umbilicus, and 

 nearly flat spire, except that the first whorl projects when not worn; 

 solid, yellowish-brown, rather dull, sculptured with slight growth- 

 lines only. Whorls 4-J, convex, the last one very deeply descend- 

 ing in front. Aperture quite oblique, nearly circular, the peris- 

 tome built forward, becoming free from the preceding whorl, and a 

 little contracted. Diam. 10, alt. 4.8 mm.; diam. 9, alt. 

 4.7 mm. 



Tane-ga-shima (Mr. Y. Hirase, No. 658). 



In the larger S. japonicum the last whorl descends much less in 

 front; the peristome is expanded and not so much, usually not at 

 all, built forward. It is named for Mr. Nakada, an earnest and 

 successful collector for Mr. Hirase. 



Spiropoma is a new name recently substituted for Coelopoma, 

 which was found to be preoccupied. 



