PORPHYROBAPHE. 151 



spots), slightly oblique; peristome somewhat thickened, or very 

 heavily thickened and built forward, of a rich purple color; columella 

 with a moderate white fold above ; parietal wall with a thick dark 

 chestnut callus, sometimes purple-edged. 



Alt. 2f, diam. .. 1J inch (Sowerby). 



Alt. 60, diam. 35 mill, (typical form). 



Alt. 66, diam. 37 mill. ) 



[ var. bilabratus. 

 Alt. 54, diam. 31 mill, j 



N.-W. Peru : Lechugal, near Tumbez (Stolzmann) ; Western 

 Ecuador: Prov. del Oro, at Chacras, on the Rio Zarumilla (Wolf), 

 Santa Rosa (Dohrn) ; Prov. Guayas at Puna. Island (Martinez), 

 Guayaquil (Fontaine, Paz and others), Oolonche (Wolf) ; Prov. 

 Manabi at Portoviego (Cousin), Montechristi (Lehmann), Island of 

 Plata (Cuming, Wolf); Prov. Esmeraldas at Msmeraldas (Lehmann), 

 a small form. Andean region in the Pilaton Valley, Prov. Pichincha, 

 at 1000 meters alt. (Boetzkes), and Macas in the Amazonian drain- 

 age, Prov. Chimborazo (Martinez). 



Bulimus iostoma SOWERBY, Zoological Journal i, p. 58, pi. 5 f. 

 1 (1824). DUNKER, Jahrb. d. D. Malak. Ges. ix, 1882, p. 379. 



Pachyotis iostoma BECK, Index Moll. p. 56 (1837) Bulimus yos- 



tomus VILLA, Dispositio Syst. p. 20. Bulimus iostomus PFR., Monogr. 

 ,Hel. Viv. ii, p. 29 ; iii, 307 ; iv, 370 ; vi, 14 ; viii, 22 ; Conchyl. Cab. 

 p. 190, pi. 56, f. 1, 2. HIDALGO, Journ. de Conchyl., 1870, p. 44; 

 Viaje al Pacifico, p. 60, pi. o, f. ,7, 8. Bulimus (Borus} iostoma 

 ALBERS, Die Hel., 1850, p. 142. Orthalicus (Porphyrobaphe) iosto- 

 mus MARTENS in Alb., Die Hel. (2), p. 227 (1860). REIBISCH, 

 Sitzungsber, u. Abhandl. Nat. .Ges. Isis, 1896, p. 58 (1897). Buli- 

 mus (Porphyrobaphe) iostomus Sow., L.UBOMIKSKI, P. Z. S., 1879, 

 p. 721 Porphyrobaphe, iostoma SHUTTLEWORTH, Notitire Malak. i, 



p. 70 (1856) MILLER, Malak. Blatter xxv, p. 184 (1878) 



DOHRN, Jahrb. d. D. Malak. Ges. ix, 1882, p. 110 (variation). 

 KOBELT, Illustr. Conchylienbuch, ph. 82, f. 12.- 'Porphyrobaphe ios- 

 tomus COUSIN, Bull. Soc. Zool. de France xii, 1887, p. 202. Oonf. 

 FISCHER, Exped. Scient.. Mex., Moll, i, p. 433 (brief account of 

 anatomy). Porphyrobaphe jostomus P^ETEL, Catal., p. 99. 



Bulimus phasianella VALENCIENNES in Humboldt & Bonpland's 

 Rec. d' Obs. Zool. ii, p. 244, pj. 55, f. 4 (1833). DESHAYES in Fer., 

 Histoire ii, p. 24, pi. 143, f. 1-3. Bulimus phasianellus DESH. in 

 Lam., Anim. s. Vert, viii, p. 259. REEVE, Conch. Icon., pi. 15, f. 



