1901.] NATURAL SCIENCES OF PHILADELPHIA. 347 



slowly descending in front, convex beneath. Aperture broadly 

 lunate, slightly oblique, bluish and showing the band inside ; peris- 

 tome expanded and rather narrowly reflexed, thickened within, 

 purple, with 'the extreme edge pale ; columellar margin broadly 

 dilated, very dark, half covering the umbilicus. 



Alt. 35, diam. 43 mm. 



Alt. 29, diam. 37 mm. 



Alt. 26, diam. 33 mm. 



Alt. 25, diam. 32 mm. 



Alt. 20, diam. 27 mm. 



Alt. 19-J, diam. 26 mm. 



Oshima^ (Mr. Y. Hirase, No. 357). 



This magnificent species is related to both E. caliginosa^ and E. 

 mercatoria^ but is more globose than either, with more convex 

 whorls. It differs conspicuously from E. caliginosa in having the 

 base of the shell and aperture rounded, not conspicuously flattened, 

 as they are in caliginosa. The basal lip, moreover, is not sinuous. 

 E. oshimce resembles E. mercatoria in the form of the aperture, 

 but differs in being more globose, with a larger umbilicus in shells 

 of the same size, and the whorls are more convex. 



The variation in size, as shown by the above measurements, is 

 extraordinary, but there seems to be a complete series of interme- 

 diate specimens. The smaller shells are those most resembling E. 

 mercatoria. E. oshimce is thus related to species of Okinawa, and 

 not to the luchuana group of Japan proper. 



Chlorites euoharistus n. sp. 



Shell umbilicate, thin, concave above, of a rich, dark chestnut 

 color. Densely hairy, the hairs long, regularly arranged in 

 diagonal lines descending forwardly and backward, the surface 

 between them minutely papillose. Whorls 4J, the earlier ones 

 forming a rather deeply sunken spire, the last third of the last 

 whorl deeply descending to the periphery, the whorl preceding this 

 coiled in a plane. The first whorl is glossy and smooth; the last 

 whorl widens toward the aperture, and is obscurely gibbous and 

 then contracted behind the lip; the base convex, having a small 

 excavation behind the basal lip, producing a low prominence just 

 within the basal margin of the aperture. Aperture very oblique, 



1 Catal. Marine Moll. Japan, PL 10, figs. 1-3, 6. 



2 Ibid., fig. 5. 



