BULIMULUS-PLECTOSTYLUS. O 



p. 7. Succinea broderipii PFR., Symbols, ii, p. 131. Plectostylus 

 broderipii BECK, Index, p. 58. 



It is more ventricose than any allied species except B. cotarnix, 

 which is more solid, with straighter columella. 



The large, typical form is reported by Cuming from Copiapo ; the 

 smaller tessellated form from Iquiqui. Paposo specimens are also 

 small. Besides the large, richly variegated shells and the small 

 tessellated form figured, there are many of intermediate size before 

 me, with only small spots and rather faint, closely scattered dots. 

 In some of these, and in small specimens generally, the sculpture is 

 not typically developed. Some geographic races of B. broderipii 

 will no doubt be recognized eventually. 



B. BUSCHII (Pfeiffer). PL 6, figs. 84, 85. 



Shell imperforate, ovate-acuminate, very minutely granulated, 

 pellucid. Tawny-buff, longitudinally painted with irregular streaks 

 and flames; spire papillar at the apex; whorls 5, rather flat, the 

 last double the length of the spire. Aperture oval-oblong; peri- 

 stome simple and acute, the columellar margin somewhat thickened 

 and a little reflexed. Alt. 24, diam. 15 mill. (JFjfr.). 



Habitat unknown (coll. v. d. Busch). 



Succinea buschii PFR., Symbolse, ii, p. 56. Bulimus buschii PFR., 

 Symb., iii, p. 53 ; Monogr., ii, p. 148 ; Conchy 1. Cab., p. 216, pi. 60, 

 f. 22, 23. 



This looks like a small streaked B. broderipii. I have not seen 

 specimens. 



B. VARIEGATUS (Pfeiffer). PI. 6, figs. 86, 87, 88. 



Shell imperforate, oblong-ovate, rather solid though not thick. 

 Straw-yellow, marked with numerous unequal girdles of long chestnut 

 spots (or in other words, obliquely streaked with chestnut, the streaks 

 cut by numerous unequally spaced girdles of the ground-color) ; 

 sometimes with irregular streaks and dots as in B. broderipii, see 

 fig. 88. Surface smooth to the naked eye, but under the lens show- 

 ing irregular growth-wrinkles and very close, fine, undulating and 

 minutely granose spiral striae, over the whole surface. Spire rather 

 long and straightly conic, the apex rather acute, apical whorls with 

 most minute, close, waved and anastomosing oblique stria3. Whorls 

 5 or slightly more, regularly increasing, nearly flat, separated by a 

 shallow weakly denticulate suture ; last whorl long. 



