110 AURICULELLA, MAUI. 



pressed at the base ; apex obtuse ; spire slender, pyramidal, 

 suture impressed; whorls 6, flatly convex, the last large, 

 slightly inflated; strongly extended; lip somewhat reflexed, 

 slightly expanded; parietal lamella strong, white; columella 

 scarcely dilated above; white or pale straw color, sometimes 

 chestnut, with a wiiite band, apex brownish. Length 6, diam. 

 4 mm." (Pse.). 



West Maui: Honolua (Thaanum). 



Auriculella expansa PSE., Jouru. de Conchyl., 1868, xvi, p. 

 343, pi. 14, fig. 8. PFEIFFER, Mon. Hel. Viv., viii, p. 210.- 

 ANCEY, Bull. Soc. Malac. France, vi, 1889, p. 226 ; Proc. Malac. 

 Soc. London, vi, p. 121. A. expansa var. porcellana ANCEY, 

 Bull. Soc. Malac. France, vi, 1889, p. 226. 



As pointed out by M. Ancey this species is related to A. 

 uniplicata. In fact, some specimens of the latter approach 

 very closely to it. Typical specimens of A. expansa are very 

 easily recognized by their diagonal aperture, shorter spire 

 and solid texture. Eight specimens of this species in 

 the Academy of Natural Sciences of Philadelphia (no. 

 59,047), presented by the author, are very closely related to 

 A. crassula. They are rather solid, with a prominent tubercle 

 at the angle of the outer lip. The aperture, however, is more 

 circular and more diagonal than in typical specimens of A. 

 crassula, and the base is broader. A. expansa seems to be a 

 form related to both A. uniplicata and A. crassula, but not 

 intermediate between them. 



Mr. Ancey 's var. porcellana is probably a synonym of A. 

 crassula. The original account follows: "I have received 

 from the eastern part of the island of Maui a pretty form of 

 Auriculella which I refer to expansa as a variety (var. por- 

 cellana), and which differs from the type described above by 

 the absence of any compression of the base of the last whorl, 

 by the smoother shell of a yellowish white, gray towards the 

 summit, by the thin, prominent, compressed parietal lamella, 

 by its relatively small aperture, by its thick peristome, but 

 evidently patulesceiit at the base and columella only, and by 

 its margins joined by a strong callosity which is thickened 

 towards the superior angle. Shell dextral or sinistraL 

 Length 6, diam. 3%, height of aperture 2% mm." (Ancey). 



