36 DRYM^US, MEXICO AND CENTRAL AMERICA. 



peristome broadly expanded, white, the columellar margin much 

 dilated, vaulted. Alt. 47, diam. 18, length of aperture inside, 18 

 mill. (Pfr.) 



Western and southwestern Guatemala ; Nicaragua. 



Bulimus lilacinus REEVE, Conch. Icon, v, Bulimus, pi. 74, fig. 

 532 (1849) (young specimen). PFR., Monogr. Helic. Viveut. iii, 

 p. 326 Bulimus (Drymceus) lilacinus PFR. in Malak. Blatt. ii, p. 

 151 (1855) Otostomus (Hamadryas) lilacinus H. & A. ADAMS, 

 Gen. Moll, ii, p. 150 Bulimulus (Drymceus) lilacinus ALBERS, 

 Die Helic. ed. 2, p. 211 FISCH. & CROSSE, Miss. Scient. Mex., 



Mollusca, i, p. 479, pi. 20, figs. 1, 2 ; pi. 24, figs. 5, 5a Otostomus 



(Drymceus) lilacinus v. MART., Conch. Mittheil. ii, p, 191; Biol. 

 Centr. Amer., Moll, p. 201, pi. 12, f. 3-6. Bulimus patricius 

 REEVE, Conch. Icon, v, Bulimus, pi. 81, fig. 600 (Dec. 1849). 



"According to the MS. notes of Dr. O. Stoll, this species, and 

 especially the var. unicolor, is characteristic of the forests of the west- 

 ern or Pacific slope of the Guatemalan Cordillera, at an elevation of 

 between 3000 and 4000 feet above the sea, descending in some local- 

 ities nearly to 2000 feet. The specimen collected by Mr. Champion 

 at El Reposo in the lowlands between Retalhuleu and the Pacific 

 coast is remarkably small, attaining, only 36J millim. in length ; it 

 exhibits, nevertheless, the remains of an older expanded aperture 

 (such as is often to be seen in 0. dombeyanus) at the back of the last 

 whorl, which corresponds to a length of 30 millim. This early build- 

 ing of an aperture, as if it were adult, seems to indicate a longer in- 

 terruption or slowness of growth, caused by unfavorable conditions of 

 the locality. The var. d, which I know only from the description 

 and figure of Fischer and Crosse, closely resembles, at first sight, 0. 

 chiapensis." (Martens.) , 



Von Martens gives the following varieties : 



a. Typical (figs. 1, 2, 3). 4-5 purple brown bands, striolate, fre- 

 quently interrupted ; throat violaceous ; peristome yellow-bordered 

 outside. (Reeve, fig. 600 ; Fisch. & Crosse, pi. 20, fig. 1, 2.) 



S. W. Guatemala : San Augustin, department of Solola (Bocourt) ; 

 same locality, at an elevation of 3000 feet above the sea (Stoll). 



b. Undulosus (fig. 4). Pale violaceous, with undulating vio- 

 laceous streaks ; throat violaceous, peristome yellow outside. 



W. Guatemala : Hacienda de las Nubes, Cerro Zunil, Pacific slope, 

 4000 feet alt. (Champion). 



