1900.] NATURAL SCIENCES OF PHILADELPHIA. 445 



umellar lamella very weak, not extending upon the expansion of 

 thejip, or immersed. Plica principalis very long (the whorl out- 

 side a little swollen above it), extending nearly to the lip. Upper 

 palatal plica extremely short, united with the lateral, nearly straight 

 lunella; no lower palatal plica. Clausilium long, tongue-shaped, 

 somewhat tapering toward the blunt apex. 



Length 16, diam. 3 mm. 



Deyai, Prov. Nagato (Mr. Y. Hirase). 



This Hemiphcedusa differs from C. aurantiaca Bttg. by wanting 

 a lower palatal plica (which in C. aurantiaca makes an I-like 

 figure with the lunella and the upper palatal plica); by the 

 lateral, not ventral, position of the lunella, and the more slender 

 contour. C. awajiensis is much more obese. 

 Clausilia aulacophora n. sp. PL XIV, figs. 18, 19, 20. 



Shell small, slender, moderately attenuated above, opaque, dull 

 reddish brown, paler above; finely striate, the last whorl more 

 coarsely so. Whorls 10, convex, the last short, compressed later- 

 ally, hardly narrower than the preceding, a little turgid below the 

 suture and at the base. Aperture small, pyriform, with well- 

 defined and slightly retracted sinulus. Peristome white, thick- 

 ened and well expanded, the outer margin excavated above. 

 Superior lamella strong, oblique, continuous with the spiral lamella, 

 and extending to the margin; a groove on the right side of it, 

 usually producing a notch or emargination in the upper margin of 

 the lip, and followed by a small rounded tubercle, to the right of 

 which there is sometimes a second shallow groove in adult shells. 

 Inferior lamella immersed, becoming strong and subvertical within. 

 Subcolumellar lamella completely immersed. Principal plica a 

 half whorl long, visible within the aperture. Upper palatal plica 

 short, continuous anteriorly with and curving into the lunella, 

 which is united with the middle of the lower palatal plica. There 

 is a punctiform plica below the latter. Clausilium long, tongue- 

 shaped, emarginate behind, the margins slowly converging toward 

 the apex, which is bluntly attenuated. 

 ^ Length 10, diam. 2.1 mm. 



Fukura, Awaji Island (Mr. Y. Hirase). 



Belonging to the Hemiphsedusan group of C. platydera, as defined 

 by Dr. Boettger, this small species is well disl inguished by the 

 groove in the peristome on the right side of the superior lamella. 



