196 rROCEEDiNGS OF THE ACADExMY OF [March, 



narrow. Leugth (measured in the ordinary manner) 13, diam. 

 9, longest axis of aperture 11, width 7.5 mm. Largest specimen 

 in type lot 14.5 mm. long. 



Ogasawara, or Bonin, Islands (Mr. Y. Hirase, Xo. 6176.). 



I am no enthusiast on the subject of specific differentiation in 

 the genus Succinea, but the two species described above diflfer from 

 those previously known so strongly that they become of some 

 interest. It is questionable whether these species are of common 

 ancestry with S. lauta or »S'. horticola, the two Japanese Suceineas. 

 I incline to the view that they have no direct relationship. 



Some years ago, the Abbe A. Vathelet gave me specimens of 

 Succinea lauta under the name " S. Vatheleti Mabille." I do not 

 know that this supposed new species has been published. 



COLUMBELLID^. 

 Columbella polynyma n- n. 



Oolumbella misera Sow., Dunker, Index Moll. Mar. Jap., p. 54. Not 

 C. miser Sowb., Thes. Conch., I, p. 129 bis, PJ. 38, fig. 111. 



Columbella japonica Martens, Conchol. Misc., in Archiv f. Naturg., 

 LXIII, 1897, p. 170, PI. 16, fig. 6. Not C. japonica Reeve, Conch. 

 Icon., 1858. 



Shell short-fusiform, solid, yellow or orange- yellow, typically with 

 a subsutural white band irregularly marked with black-brown or red- 

 brown, the slender lower portion of the base also whitish with dark 

 or reddish dots or stripes; two white lines or girdles likewise dark- 

 dotted upon the intermediate part of the last whorl; but sometimes 

 the dark markings are faint or in part wanting. Surface glossy, 

 sculptured with very short longitudinal folds above, scarcely 

 reaching the suture and not extending below the periphery; the 

 folds on the spire becoming weak at both sutures. Base spirally 

 lirate. Whorls about Qh. Aperture rather narrow, the outer lip 

 thick and furnished with a series of short folds within; columella 

 smooth. Length 11, diam. 5.3, length of aperture 5.5 mm. 



Kumihama, prov. Tango (Mr. Y. Hirase). Types No. 80,556, 

 coll. A. N". S. P., from 1,097 of Mr. Hirase's collection. 



This pretty liltle Columbella has fared ill in the matter of names^ 

 as the references above bear witness. It is closely related to the true 

 C misera oi Sowerby, but that species has stronger folds, especially 

 those upon the spire, and a white or nearly white ground-color 

 profusely marked with blackish-brown, the summit of each fold 

 having a vertical line or a spot of that shade. In C. polynyma 

 the folds are weaker, and the color-scheme quite different. 



