1902.] NATURAL SCIENCES OF PHILADELPHIA. 531 



strongly spiral, approaching close to the superior lamella, and 

 penetrating as far. Subcolumellar lamella either barely visible 

 from in front or wholly immersed. Principal plica rather small, 

 lateral. Palatal plicae two, lateral, the upper curved a little 

 further inward than the straight, oblique lower one. No lunella. 



Clausilium (PL XXVIII, figs. 26, 27) very strongly curved, 

 almost in a semicircle, wide, broadly rounded below, tapering 

 above, not excised at the filament. 



Length 18, diam. 4 mm. ; length of aperture 4.6 mm. 



Oshima, Osumi. Types No. 83,305, A. N. S. P., from No. 932 

 of Mr. Hirase's collection. 



This species is somewhat more slender and graceful than C. sie- 

 boldi var. diptyx of Kyushu, with more attenuated early whorls; 

 but it differs chiefly in the much closer approach of the inferior to 

 the superior lamellae in the aperture, the continuity of the superior 

 with the spiral lamella, and the deeper penetration of both spiral 

 and inferior lamellae. As in C. sieboldi, the position of the 

 wanting lunella is indicated by a pale area in the shell. The 

 clausilium differs, being broadly rounded at the apex in C. neni- 

 opsis, and without excision near the filament, while in 0. sieboldi 

 var. diptyx the apex is angular and there is an abrupt excision on 

 the palatal side of the filament. 



The converging lamellse in the mouth remind one of Nenia or 

 the allied genus Garnieria. 



ADDITIONS TO AND CORRECTIONS OF THE CATALOGUE OF 

 JAPANESE CLAUSILIID^:. 2 



Section MEGALOPH^EDUSA Bttg. 

 C. DUCALIS var. DECAPITATA Pils. Kashima, Harima. 

 Section HEMIPH^EDUSA Bttg. 



C. INTERLAMELLARIS v. Mart. (Catal., p. 648). The locality 

 Kirishima, Kyushu, is given by Boettger, Syst. Verz., p. 57. 



C. PLATYDERA v. Mart. A var. elongata from Kobe is men- 

 tioned by Bttg., Syst. Verz., p. 57. 



C. STRICTALUNA var. EMERSA Ancey. Hitozashi. 



C. AGNA Pils. Yakushima, Osumi. 



2 See these Proceedings for 1901, pp. 647-656. 



