318 PARTULA, MARIANNE ISLANDS. 



Length 16.5, diam. 10, aperture 9 mm. ; whorls 

 Length 14, diam. 8.3, aperture 8 mm. ; whorls 4%. 

 P. radiolata rushi, n. var., pi. 41, fig. 1. Dr. W. H. Rush 

 collected examples much darker in color at Port San Luis 

 d'Apra, Guam (no. 84841 A. N. S.). The last iy 2 whorls are 

 striped with cream and dark brown, with a narrow but con- 

 tinuous brown peripheral band. The spire is uniform dark 

 brown, aperture brown within. Sculpture typical. Length 

 15, diam. 9, aperture 8.8 mm. (pi. 41, fig. 1) . 



111. P. QUADRASI Moellendorff. 



Shell dextral, narrowly and half-covered perforate, rather 

 ventricose ovate-conic, very thin, pellucid, delicately striatu- 

 late transversely, decussated by closely crowded spiral lines; 

 a little shining, pale buff variegated with narrow darker and 

 whitish streaks, sometimes ornamented with two indistinct 

 bands. Spire subregularly conic, the apex somewhat obtuse. 

 Whorls 4, a little convex, separated by an appressed, mar- 

 gined suture, the last whorl quite convex, nearly tumid. Aper- 

 ture rather oblique, oval, a little excised; peristome simple, 

 thin, well expanded, the columella dilated above, recurved, 

 forming a distinct angle, almost channeled, with the parietal 

 wall. Length 15, diam. 10.5, aperture 9x7 mm. (Mlldff.) 



Marianne Is. (Quadras). 



Partula quadrasi MLLDFF., Nachrichtsblatt d. Deutschen 

 Malak. Ges. xxvi, Feb., 1894, p. 15. 



An unfigured species which seems to differ from the small 

 form of P. radiolata in sculpture and by having fewer whorls. 

 It is possibly identical with Ferussac's P. fragilis, a lost 

 species which has not been figured. The description follows : 



P. fragilis Ferussac. Shell ovate-elongate, perforate, 

 fragile, striatulate, pellucid, reddish; spire obtuse, sutures 

 strongly marked. Whorls 4, the last ventricose, subcarinate, 

 larger than the rest. Aperture ovate, peristome subreflexed. 

 Marianne Is. (Gaudicho). 



P. fragilis FER., Tableaux Syst. des Anim. Moll. p. 66 

 (1821). 



