rLEKOCHEILUS-EURYTUS. 75 



The typical form of this species is rather thin and beautifully 

 variegated with dark spots (often coalescent into irregular streaks) 

 bordered on the left with light; and in the aperture this pattern is 

 conspicuous. It is connected, however, by intermediate specimens 

 with the following : 



Var. LAMARCKIANUS Pfr. PI. 32, fig. 38. 



"More solid and opaque, dark chestnut with few small scattered 

 darker spots, mostly oblique, and hardly showing within the dark 

 fleshy-brown aperture. Spire often superficially subplicate. 



Alt/48 to 62 mill. 



Andes of U. S. of Colombia, 8,000ft. alt. (Funck) ; La Esperanza 

 estate, near Rio Negro (Bland). 



B. lamarckianus PFR., P. Z. S., 1847, p. 229 ; Monogr., ii, p. 45. 

 REEVE, Conch Icon., pi. 24, f. 156. BLAND in C. B. Ad., Contrib. 

 to Conch., No. 12, p. 231. Mouss., Malak. Bl.,xvi, p. 173 (1869). 



Reeve's figure, which I have copied, represents a specimen 

 somewhat larger and more obese than those before me, from Cum- 

 ing and Bland. 



Yar. AMPULLA ROIDES Mousson. PI. 32, figs. 39, 40. 



Larger than B. coloratus, more convex above, the spire shorter, 

 suture deep and umbilicus wider. Tawny-buff, with indistinct brown 

 spots. Alt. 73, diam. 55 mill. 



Bogota (AVallis). 



B. ampullaroides Mouss., Malak. Bl., xxi, 1873, p. 8. PFR., 

 Novit. Conch., iv, p. 132, pi. 130, f. 1, 2. Con/., DOHRN, Jahrb. D. M. 

 Ges.,ii, 1875, p. 303,304. 



This is regarded by Dohrn, evidently with justice, as an extreme 

 form of coloratus. It approaches P. gibbonius in size, but is com- 

 pletely distinct from that species in the shorter spire, greater con- 

 vexity of the whorls above, colored columella, etc. 



P. GIBBONIUS Lea. PI. 33, fig. 46. 



Shell umbilicate, very ventricose, solid; chestnut-brown with 

 scattered darker spots, sparser on latter half of body-whorl. Sur- 

 face lusterless, irregularly icritikle-striate and densely granulated, 

 the granules readily visible to the naked eye. Spire slender. 

 Whorls 5, the first planorboid, sometimes wanting, the next minutely 

 vertically striate ; last whorl very rapidly enlarging, swollen. 



