SOUTH AMERICAN OBELISCUS. 247 



Brazil. 



Bulimus obeliscus Moric., PFR., Monographia, ii, p. 152, 

 and of DESHAYES in Fer., Hist., pi. 142 A, f. 5, 6; not of 

 Moricand. Bulimus carphodes PFR., Conchyl. Cab., p. 108, 

 pi. 34, f. 2; Monogr., iii, p. 396 (1853). 



This is a more slender and less solid species 'than the closely 

 related 0. obeliscus, with more whorls in shells of equal 

 length. Pfeiffer's figure, copied on my plate, well repre- 

 sents it. A specimen before me measures, length 72, diam. 

 15, diam. at second whorl 3, length of aperture 14.5 mm., 

 whorls 15. Deshayes has figured a larger shell, .about 79 x 

 17 mm. 



3. O. PLANOSPIRUS (Pfeiffer). PI. 34, fig. 52. 



Shell imperforate, turrite, solid, closely wrinkle striate, ob- 

 soletely decussate with impressed lines, alabaster white under 

 a deciduous tawny cuticle. Spire elongate, at the apex pass- 

 ing into an obtuse cone ; suture impressed. Whorls 13, nearly 

 flat, the last about one-fifth the length, obsoletely angular 

 below the middle. Columella rather narrow, calloused. 

 Aperture oblique, truncate-oblong; perdstome simple, unex- 

 panded. Length 84, diam. 17, aperture 16 x 8 mm. (P/V.) . 



Habitat of type from Cuming coll. unknown. Head waters 

 of the Mucury river in eastern Minas Geraes, Brazil (Lieut. 

 Will). 



Bulimus planospirus PFR., Pro<c. Zool. Soc., 1852, p. 60; 

 Monogr., iii, p. 396; Conchyl. Cab., p. 108, pi. 34, f. 3 

 Stenogyra planospira Pfr., DOHRN, Jahrb. D. Malak. Ges., 

 x, 1883, p. 354. 



"Differs from B. obeliscus in sculpture, the wider and 

 flatter whorls and the apex" (Pfr.). Dohrn notes that it 

 differs from the very closely related 0. obeliscus by the flat- 

 ter, more rapidly increasing whorls and the consequently 

 greater length of the aperture, while tangible differences in 

 the -sculpture are not present. I have not seen the species. 



4. O. SYLVATICUS (Spix et Wagner). PI. 34, figs. 54, 55. 



' ' Shell long-'conic, subturrite, smooth, glosisy, pellucid, sub- 



