PLEKOCHEILUS. 129 



P. PLECTOSTYLUS (Pfr.). Vol. X, p. 70. 



Road from Popayan to Coconuco, on the Altura de los Pesares, 

 2400-2600 meters elevation, and on the road from Popayan to Patia, 

 at about 1500 meters (Stu'bel, v. Mart., Conch. Mittheil., p. 158). 



P. GUILDINGI (Dohrn) = P. GUENTHERI (Sowb.). Vol. x, p. 71. 



The name was pre-occupied by Pfeiffer, Symbols ii, p. 115 (1842), 

 and will be suppressed in favor of P. GUENTHERI Sowb. 



P. COLORATUS (Nyst). Vol. x, p. 74. PI. 21, fig. 64. 



In Colombia, Department of Santa Marta, this species was found 

 by Mr. Herbert H. Smith (1898-1901) from 800 to 6000 ft. above 

 sea level. Size and coloration vary widely, the largest and thinnest 

 examples occuring at the higher altitudes. Mr. G. H. Clapp has 

 supplied the following notes on the specimens from various localities, 

 all of which lie to the'east and southeast of Santa Marta. 



Calavase Road, 8 miles east of Bonda, 800 ft. elevation. Alt. 57, 

 diam. 38 ; aperture, alt. 381 mill. (This was the only living shell 

 found so low down.) 



Campo Alegre, about 1500 ft. elevation. 67^x42 ; apert. 44 mill. 



Mincaat 2000 ft. elevation, (a) 46|x 28 ; apert. 301. (J) 51x32; 

 apert. 331. (c ) 561x36; apert. 361. (d) 611x391; apert. 39. 

 These four shells show a wide variation in color and thickness. 

 Specimen "a" is thin and dark-colored, the dark spots being more 

 or less confluent and arranged in streaks. " b " is very thin and 

 light-colored, the spots being widely scattered on the body whorl 

 and arranged in zigzag streaks on the penultimate. " c " is very 

 heavy and dark-colored, the markings are arranged in alternate dark 

 and light streaks which are irregular, the light streaks being spotted 

 with brown. " d " somewhat thinner than "c " and the color pat- 

 tern is exactly like pi. 32, fig. 42, of vol. x. 



Don Amo, 2000 ft, elevation. 63x38^; apert. 40 mill. 



Above Minca about 2500 ft. 761x50 ; apert. 52 mill. 



Onaca, 2500 ft. 89x551 . aper t. 59 mill. 



Jiracasaca. Clearing at about 2500 ft. 59x36 ; apert. 37^ mill. 



Jiracasaca, 2800 ft. 641x39 ; apert. 4()i. This is a straw-colored 

 shell without any trace of brown spots on the body-whorl and with a 

 few very faint brown zigzag markings on the spire. This is a quite 

 distinct color-form. 



