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. (Ancey.) 



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



Porpltyrobapbe yalactostoma, ANCEY, Bull. Hoc. Malac. France, 

 vii, p. 153 (1890). 



Akin to Porph. fraseri Pfr. and especially Porpb. consirn Jouss., 

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

 and the characters of the columella. (Ancey.} 



An unfigured species, apparently more slender than fraseri, with 

 shorter month. Ancey apparently intends P. augustiby his reference 

 to " Porph coi/sini." 



0. 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. (Jowss.} 



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



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



For phyrobf plie augusti Jouss.. Bull. Soc. Zool. de France, xii, p. 

 165, pi. 3, f. 10 (August 1, 1887) COUSIN, t. c., p. 2Q3. Orlhal- 

 icus (Pophyrobaphe) auyusti REIBISCH, 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 strias which are not 



