178 PARTULA, SOCIETY ISLANDS. 



ampla, ovata ; labro simplici, reflexo ; pallide straminea. Long. 

 13, diam 8i/ 2 mill." 



8. P. TUEGIDA Pease. PI. 24, fig. 16. 



The shell is shortly, openly rimate, not perforate, short, 

 obliquely ovate, extremely thin, fragile, corneous, faintly 

 tinted with pale brown, slightly transparent. The surface 

 is glossy, marked with growth-lines and minute, close, spiral 

 striae. Spire very short, conic; suture marked with a fine 

 white line. Whorls 4^2, convex, the last very large, evenly 

 swollen. Aperture oblique, broadly ovate, two-thirds the 

 length of the shell. Peristome thin, narrowly expanded, the 

 columellar margin dilated and flattened above. Length 17, 

 diam. 11.6, length <of aperture 11.5 mm. 



Baiatea: though widely diffused it is excessively rare. 

 ( Garrett) . 



Bulimus turgidus PEASE, Proc. Zool. Soc., 1864, p. 670; 

 1871, 473. PFEIPFER, Mon. Hel., vi, p. 12. Partula turgida 

 HARTMAN, Cat. Part., p. 12 ; Obs. Gen. Part., Bull. Mus, Com. 

 Zool., ix, p. 188. GARRETT, Journ. A. N. S. P. ix, 1884, p. 

 56, pi. 3, f. 74. 



This delicate shell is larger and more opaque than P. arguta, 

 and differs in the non-perforating umbilical fissure. Garrett 

 remarks that "Like P. clara and P. annectens, it appears to 

 be gradually becoming extinct. ' ' 



Section PARTULA s. str. 



Partula FER., Tabl. Syst. p. 65 (1821). HERRMANNSEN, 

 Indicis Gen. Malac. ii, p. 204, type P. faba. Nenia HART- 

 MAN, Cat. Genus Partula, 1881, p. 7, type P. auriculata 

 Brod. ; not Nenia, H. & A. Adams. Astrcea HARTMAN, t. c. p. 

 7, type P. dentifera Pfr. ; not Astraa Gmelin. Clytia HART- 

 MAN, t. c. p. 8, type P. umbilicata Pse. ; not Clytia Lam. 

 Ilia HARTM., t. c. p. 8, type P. lutea Less. ; not Ilia Leach, 

 1817. CEnone HARTMAN, t. c. p. 9, type P. hebe Pfr. ; not 

 Oenone Savigny. Helena HARTM., t. c. p. 9, type P. otahei- 

 tana. Pasithea HARTM., t. c. p. 10, type P. spadicea Rve. ; 



