72 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



microscopic spiral lines above and below under a tbin cuticle, and 

 covered with transverse rows of interrupted scales. Last whorl 

 shortly descending in front, with an acute compressed keel at the 

 periphery, the keel covered with a deciduous fringe of moderate scales. 

 Aperture oblique, sub-diagonal; peristome thin, acute, margins 

 approaching, the upper straight, the outer and lower a little 

 expanded. Umbilicus wide and deep. Diam. niaj. 12-14-5, inin. 

 10-5-13 mm. ; alt. 6-5-8 mm. 



Sal. — Takeya, province Idzumo. 



Type in my collection. Ten specimens. 



The nearest ally is Eulota (Plectotropis) trochula, A. Ad., from which 

 the new species differs in being smaller and thinner, as well as in its 

 much wider umbilicus and more acute apex; further, the peristome is 

 less thickened and reflected, its margins more convergent, and the 

 peripheral fringe shorter and more deciduous. 



12. Eulota (Plectotropis) horrida, Pilsbry. PI. VIIT, Figs. 6-8. 

 Shell widely umbilicated, flattened, discoidal, thin, dark corneous. 



Spire depressed, apex obtuse, suture rather shallow. "Whorls 5-5 J, 

 slowly widening, flattened above, tumid below; striated transversely, 

 and decussated by microscopic spiral lines under a thin cuticle, which 

 is raised into thin transverse lamellae ; these lamella? are produced into 

 long fimbriae, rather short and dispersed above, but longer and densely 

 covering the shell below, where they are arranged in more or less 

 regular horizontal rows. Last whorl descending slowly and shortly 

 in front, carinated above the periphery, a little constricted behind the 

 peristome. Aperture oblique, subcircular ; peristome thin, acute, 

 scarcely thickened ; the margins approaching, the upper straight, the 

 outer and lower a little expanded, columella!' margin slightly reflexed 

 over the wide and deep iimbilicus. Diam. niaj. 13-5, min. 12 mm.; 

 alt. 6 mm. 



Hah. — Saigo, province Uzen. 



Two specimens. 



The nearest ally appears to be the Chinese Eulota (Plectotropis) 

 trichotropis. E. horrida differs from it, however, in the much more 

 depressed spire, in the greater inflation of the whorls below, as well 

 as in the coarse, stiff, closely set fimbriae of the lower surface. The 

 latter character, indeed, separates the present from every other known 

 species of the genus. 



[Since the above description was written, I find Mr. Pilsbry has 

 published this species (by a strange coincidence, under the same 

 name as proposed by me) in the Nautilus, May, 1900, xiv, p. 11.] 



13. Eitlota (Euhadra) Senckenbergiana, Kob. Kokubu, province 

 Hida. Two specimens. Typical forms of this beautiful and rare 

 species ; they do not quite reach the dimensions of Kobelt's types. 



Diam. maj. 49, min. 43 mm.; alt. 33mm. 

 Shinano. Two specimens. One is much decorticated. 

 Diam. maj. 54, min. 47 mm. ; alt. 33 mm. 

 The second specimen is more depressed than the other. 

 Diam. maj. 54 - 5, min. 46 mm.; alt. 29 mm. 



