GASTROCOPTA, EASTERN ASIA. 109 



Length 2.25, diam. above aperture 1.15 mm. (Miyakejirna). 



Length 2.4, diam above aperture 1.15 mm. (Shanghai, 

 China). 



The synonymy has been worked out by Dr. von Moellendorff, 

 and I have verified his results by the examination of large 

 series of specimens from Heude, Hirase and Schmacker. 

 Pupa monas Heude found on stone walls and rocks in the 

 mountains south of Ning-kuo-fu, is almost typical armi- 

 gerella, rather small and cylindric the type was 2 mm. long. 



Pupa atoma, Heude, found "very common under dead leaves 

 of bamboos in the environs of Shanghai" was 2y 2 mm. long, 

 and figured without an infraparietal nodule ; but in a Shanghai 

 lot from Heude and others from Schmacker, the nodule is 

 present, though sometimes quite small and readily overlooked. 

 According to von Moellendorf, atoma has no specific char- 

 acters. PI. 20, fig. 8 is a Shanghai specimen of atoma re- 

 ceived from Heude. The form I described as Bifidaria armi- 

 gerella var. luchuana from Kunchan, Okinawa, is typical 

 armigerella ; I had compared it with shells wanting the infra- 

 parietal nodule. One of this lot is sinistral. 



40er. G. a. hachijoensis n. subsp. PI. 21, fig. 1. 



The shell is much stouter in figure than armigerella, ovate- 

 conic. 



Length 2, diam. 1.23 mm. 



Japan: Hachijo-jima, an island of Izu (Hirase) ; type and 

 paratypes No. 83395 A. N. S. P. 



41. GASTROCOPTA COREANA n. sp. PI. 21, figs. 2, 3, 4. 



The shell is subcylindric but tapering slightly from the last 

 whorl, the upper two whorls forming a convexly conic sum- 

 mit ; whitish-corneous, quite lightly striate. Whorls 5, rather 

 . strongly convex, the last flattened over the lower palatal region, 

 and with a narrow, rather low crest behind the narrowly 

 expanded lip. Angulo-parietal lamella as in B. armigerella, 

 being straight, the angular forming a spur on the right side, 

 and lower than the parietal. There is no infraparietal nodule. 

 Columellar lamella strong, short, horizontal, its inner end not 



