62 THE CONCHOLOGICAL MAGAZINE 



with close, fine, slightly curved riblets, which become weak and 

 irregular on the latter part of the last whorl, and are wanting on the 

 first i l/ > whorls. It is cylindric, the last three whorls being about 

 equal in diameter, those above forming a short cone. Whorls 6^ 

 to 7, convex, the last compressed laterally, obtusely angular at the 

 base, a little sinuous near the aperture (in basal view). The aperture 

 is truncate-oval, obstructed by 4 teeth: a vertical, compressed, 

 sinuous parietal lamella, an oblique, very deeply placed columella! - 

 lamella, and two contiguous palatal tubercles, the upper one mar- 

 ginal, opposite the end of the parietal lamella, the lower one near it 

 but further in. Length 3.3, diam. 1.8 mm. 



Cheju, Quelpart Island. Cotypes No. 95,717 Acad. Nat. Sci. 

 Philadelphia, and No. 1,541 of Hirase's collection. 



This species differs from all known Japanese and Chinese species 

 by its widely open umbilicus, its width about one-fourth to one-fifth 

 the diameter of the shell. In other characters it does not differ 

 much from Ennea hvakawa, the common Japanese species. It 

 belongs to the subgenus Sinoennea of Kobelt. An outline of the 

 base is shown in the fig. 9. 



Clausilia fusaniana Pils. & Hir. 



See p. .6 



This species proves to be widely distributed and variable. The 

 superior and spiral lamellae are always widely separated, thus differ- 

 ing from C. tau, in which they are continuous. The lower palatal 

 plica, in some forms of fusaniana, extends upward forming a weak 

 lunella, as in C. tan. Specimens from Kojeto, Korea, measure: 

 Length 15, diam. 3 mm., whorls io 1 ,. 

 12.5, „ 3-1 .. .. 9 l A- 



Three lots from Quelpart measure : 



Length 16.2, diam. 3.5 nun.; whorls 10% 1 T • 



, ■ Alt. Hanra. 

 9 X A > 



> Wone. 

 10 J 



10 1 . 

 -Cheju. 



9 J A i 



The specimens from Cheju are very much shorter and relatively 



13. 



3-25 



15-2, „ 



3 



138, „ 



2.9 



13-25. » 



3-25 



12.5, „ 



3-3 



