BULIMULUS-BOSTRYX-LISSOACME. 179 



B. LITHOICUS Orbigny. PI. 1, figs. 2, 3 ; pi. 61, figs. 14, 15, 23. 



Shell subperforate, ovate-conic, rather solid, striatulate and very 

 obsoletely decussated, shining, tawny. Spire convex-conic, rather 

 acute. Suture subcrenulated. Whorls 6, a little convex, the last a 

 little longer than the spire, rotund at base ; columella subplicate, 

 receding. Aperture little oblique, oblong-oval, fleshy-whitish inside ; 

 peristorne unexpanded, acute, the columellar margin dilated, reflexed 

 and subappressed. Alt. 31, diam. 15 mill.; aperture 17 mill, long, 

 S wide. (Pfr.). 



" Los Obrages " near La Paz, Bolivia, at 3300 meters alt. (Orb.). 



Helix lithoica Orb., Mag. de Zool., 1835, p. 13. Bulimus lithoicus 

 ORB., Voy. dans PAmer. Merid., p. 288, pi. 33, f. 10, 11. PFR., 

 Monogr., ii, p. 167 ; iii, 408 ; iv, 467 ; vi, 109. B. culminant 

 KEEVE, Conch. Icon., pi. 17, f. 98. 



The types measure 35 mill, alt., 15 diameter. Fig. 23 is Reeve's 

 culminans. 



Group of B. striatus. 



B. STRIATUS King. PL 47, figs. 74, 75. 



Shell perforate, ovate-conic, thin ; immature shells keeled or sub- 

 angular at the periphery. Whitish, more or less tinged with tawny, 

 with numerous oblique chestnut and blackish streaks, and a dark cres- 

 cent within the umbilicus (which is often surrounded by a white 

 band) ; periphery often with a light line ; apex purple, smooth. Sur- 

 face sculptured with fine rib-strive (sometimes subobsolete on body- 

 whorl). Spire conic ; whorls 6 to 6?, but slightly convex. 



Aperture oblong, half the length of shell, quite oblique, light 

 brownish, slightly streaked within. Outer lip thin, dark-edged 

 within ; columellar lip somewhat concave, dilated above. 



Alt. 18* diam. 9* mill. 



Alt. 16, diam. 9 mill. 



Santos (Cuming) ; valley of Ollantaitambo (Angrand), Peru. 



Bulinus striatus KING in Sowb., Conch. Illustr., f. 56 (July, 1833). 

 Bulimus striatus PFR., Symbolse, ii, p. 51 ; Monogr., ii, p. 209 ; 

 Conchyl. Cab., p. 225, pi. 62, f. 5, 6. REEVE, Conch. Icon., f. 139. 

 Not Clausilia striata Spix.Buliminus striatellus BECK, Index Moll., 

 p. 70 (refers to Sowerby's figure). PFR., Monogr., iv, p. 491 ; vi, p. 

 139. 



The striped color pattern and the striation are characteristic. 

 The name striatus was not preoccupied in either Bulimus, Bulinus 

 or Bulimulus, so the change proposed by Beck was unnecessary. 



