ORTHALICUS. 195 



decussated by remote spiral lines, last whorl oblong, attenuated, 

 ample. 



Aperture large, ovate, angulated above, tapering below and with 

 the peristome milk-white within, showing the spots; moderately 

 oblique, slightly receding below ; columella acutely folded above, 

 thickened, white, becoming nearly straight, tapering below, forming 

 a distinct angle with the basal lip ; margins joined by a glossy whitish 

 callus ; peristome thickened, expanded, umbilical region narrowly 

 marked with brown. (Ance.y.} 



Alt. 72, diam. 34, alt. of aperture 40 mill. Ecuador. 



Porphyrobaphe yalactostoma, ANCEY, Bull. Soc. Malac. France, 

 vii, p. 153 (1890). 



Akin to Porph. fraseri Pfr. and especially Porph. cousmi Jouss. r 

 but differing from both chiefly in the color, especially of the aperture,, 

 and the characters of the columella. (Ancei/.^) 



An unfigured species, apparently more slender than fraseri, with 

 shorter mouth. Ancey apparently intends P. augusti by his reference 

 to " Porph cousini." 



O. AUGUSTI (Jousseaume). PI. 44, fig 20. 



Shell imperforate, fusiform-ovate, solid, lightly granule-striated, en- 

 circled by white and greenish bands. Spire conic, the apex obtuse ; 

 whorls 6, the first but little convex, the last four-sevenths the total 

 length, more convex. Aperture oblong-oval, white within, with a 

 pearly lustre ; peristome violaceous, thickened, reflexed ; columella 

 white, slightly arcuate, the margins joined by a glossy callus. (Jouss.) 



Alt. 69, diam. 34, length of aperture, 40 mill. 



Ecuador : Machai, valte del Pastaza, 4900 ft. alt. (Wolf). 



Porphyrobaphe augusti Jouss.. Bull. Soc. Zool. de France, xii, p. 



165, pi. 3, f. 10 (August 1, 1887) COUSIN, t. c., p. 203 Orthal- 



icus (Pophyrobaphe) augusti REIBUCH, Sitzungsber. u. Abh. natur- 

 wiss. Gesell. Isis, in Dresden, 1896, p. 57 [bis] (1897). 



This form is apparently a member of the group of 0. fraseri, dif- 

 fering from that species chiefly in its simple columella. Good speci- 

 mens will probably show a thimble-pitted nepionic shell. Joussc aume 

 gives further details of the coloration as follows : The two earlier 

 whorls are smooth and yellowish ; the following ones are ornamented 

 with fine longitudinal denticulated striae, quite regular and crowded, 

 and decussated on the later whorls by revolving strise which are not 



