PORPIIl'ROBAPHE. 155 



GROU*P OF P. IRKOR'ATCS. 



P. IRRORATUS (Reeve). PI. 52, figs. 33-37. 



Shell imperforate, conic-ovate, solid ; spirally sulcate and closely 

 striated longitudinally, but little shining. Greenish-fulvous, with 

 irregularly-scattered fulvous and chestnut spots [or "reddish-purple, 

 last whorl covered with a pale ash epidermis, sprinkled with brown- 

 shaded fulvous white spots."] Spire conic, attenuated below the 

 obtuse, reddish-corneous apex. Whorls 6, a little convex, more 

 strongly plicate below the sutures, the last whorl ventricose, longer 

 than the spire, with rounded base. 



Aperture slightly oblique, oval, blue within ; peristome expanded, 

 thickened and reflexed, orange-colored or roseate [or buff], the mar- 

 gins joined by a thick, white or orange callus, right margin regularly 

 arcuate ; columella somewhat folded above, white or reddish, the 

 columellar margin reflexed and adnate (Pfr.). 



Alt. 64, diam. 38, longest axis of aperture 40^- mill, (specimen). 



Alt. 77, diam. 39, longest axis of aperture 43 mill. (Reeve's fig). 



Ecuador: La Mocha and Guaranda (Paz); Macas (Martinez); 

 Nanegal (Martinez, Orton, Wolf, Stiibel); Pilaton Valley (Boetzkes, 

 var. elongata and minor); Los Puentes, near Gualea (Cousin, var. 

 efangata) ; Quito (Cuming coll.) ; Voile del Pastaza, near Mapoto 

 (Wolf). 



Bulimus irroratus REEVE, Proc. Zool. Soc. Lond., 1849, p. 16, pi. 



2, f. 10 ; Conch. Icon., pi. 62, f. 427 (March, 1849) DESHAYES 



in Fer. Hist, ii, p. 50, pi. 130, f. 5, 6 PFR., Monogr. iii, p. 304. 

 HIDALGO, Journ. de Conchyl., 1870, p. 44; Viaje al Pacifico, p. 59, 

 pi. 6, f. 1. CROSSE, Journ. de Conchyl., 1871, p. 316 Porphyro- 

 baphe (?) irrorata SHTJTTL., Notitire Malac. i, p. 72 COUSIN, Bull. 



Soc. Zool. de France xii, 1887, p. 203 (p. 17 of separate copies) 



Dryptus irroratus MILLER, Malak. Blatter xxv, p. 179 ; (n. F.) i, 

 pi. 5, f. 2a (var. elongata), 2b (var. minor) OrthaHcus (Porphyro- 

 baphe) irroratus Rve., MARTENS, Conchol. Mittheil. p. 159 REI- 

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

 Orthalicus irroratus Rv., SCIIACKO, t. c., p. 197 (dentition). 



" One of the most abundant and wide-spread species of Ecuador, 

 showing great variations. The peristome is sometimes yellow, some- 

 times more or less rose-colored, in some specimens thin and weakly 

 reflexed, in others strongly thickened. The commonest form is ven- 



