."iS DltYM.V.rS, MEXICO AM> CKNTKAI. AMI.KK A. 



simple, the terminations separated, columellar margin a little ex- 

 panded, retlexed and appre--ed, basal anil outer margins acute. 



Alt. 3d, diaiu. 11, length of aperture 1-V. mill. ( C. $ F.). 



N. Giniti'iinihi : San Lin's i/e Peten (Morelet). 



liiiJiiiina liriiins MOREL., Testae. Novi.--. ii, p. 11 (18ol) PKR., 

 Monogr. iii, p. .">13: viii, p. 20 Jinlim "/s ( Dnjiim '/.<) lirliins \'\-> 11. 

 ^ CBOSSE, Miss. Scient. Mex., Moll, i, p. 491, pi. '20, f. K>. 



D. crci'LLi-s (Morelet). PI. 1, figs. 88, 89. 



Shell imperf'orate, oblong-ovate, thin, rather obliquely rugose- 

 striate, milky-whitish, spire rather long, the apex rounded, rather 

 obtuse; suture impressed. AVhorls 4, convex, the embryonal 1 .', 

 smooth, hyaline, the last whorl large, ventricose, longer than the 

 spire, somewhat attenuated at base. Aperture acuminate-ovate, 

 within shining and colored like the outside ; perismme simple, the 

 margins joined by a rather thick white callus; columellar margin 

 dilated, whitish ; basal and outer margins acute. 



Alt. 18, diam. 8, length of aperture 9i- mill. ( C. &. F.} 



Yucatan: Sisal, on sandy ground (Morelet). 



Bulimus cucnUtis MORELET, Test. Noviss. i, p. 9 (1S49) Pri:. 

 Monogr. Ilelie. Vivent. iii, p. .'!S3 ; in Martini V ( 'In limit/, S}st. 

 Concli. Cab. ed. L', Hul/mns, p. 217, pi. (id, fig. 11, 12. Jiiilimtm 

 (Leptoii/criis) ciicnUiis VVK. in Malak. lilatt. ii, |>. l.V.) (IS;").")). 

 Bulimulut ( Murniiis} <-ncnlhis MAIM i \s in Albers' Die Ihdie.,ed. 2, 

 p. 21G __ J-iufhui/lns (Scutdlus) cm-iiUus l-'ix ii. \ Ci;<>SSE, Miss. 

 Seient. Mex., Mollusca, i, p. f)19, pi. 20, fig. 11 ; with var. yracif<c>r, 

 loc. cit. p. r>19, pi. 2d, fig. 12. 



The var. t/i-iici/ftir, pi. 1, fig. 88, is proliably only an extreme indi- 

 vidual variation ratln-r than a true variety. It measures: all. 17, 

 diam. scarcely 7, length of aperture 9 mill. 



Gn<MT <>l I). AT'I KM ATI'S. 



D. i i M -i I.-IM i s (v. Martens). PI. 2, figs. 1, 2, 3, 4, f>. 



Shell minutely perfi>rate, n\ ale-ecniie. thin but moderately strong; 



irli iff, ir/'t/i ', or 6 /ii-t><i</ iiiti'n iifitril liinnls composed of large square 



jiurfil,--lii-i'irii x/mfs : the bands rarely -iibeontiniioii-, oeea-ionally re- 

 duced to few -pots or none by encroachment of the while streaks. 



