210 MOLLUSCA. 
bv. stoli: magis rugosus. (Figg. 5-8, 10.) 
Bulimulus (Scutalus) ghiesbreghti, Fisch. & Crosse, loc. cit. p. 522, t. 23. fig. 40°. 
Bulimulus ghiesbreghti, Strebel, loc. cit. t. 5. fig. 5”. 
Bulimulus jonasi, var. stolli, v. Mart. in Sitz.-Ber. Ges. naturf. Freunde Berl. 1886, p. 161°. 
Hab. Centra, Guatemata: Llano of Quezaltenango, at an elevation of from 6000 to 
9000 feet above the sea, common, chiefly on Agave and on various shrubs (Sto//) ; 
Argieta, department of Solola, in the “tierra fria” (Bocourt °); Los Encuentros, 
at an elevation of 8000 feet, at Tecpam 7000 feet, also on the northern slope of 
' the Volcan de Agua, in the belt of tall forest-trees, at from 8000 to 9000 feet, and 
at Antigua (Stol/). 
W. GuateMALa: in the forest above the Hacienda de Las Nubes, on the southern 
slope of Cerro Zunil (Champion). 
c. interstitialis : costis longitudinalibus rugularibus albis vel fulvescentibus, interstitiis lete fulvis in anfractu 
ultimo; pariete aperturali pallide rosea, columella alba. (Fig. 9.) 
Hab, CentraL GuaTeMALA: Cumbre de San Martin, on the N.W. slope of the Cordillera, 
at an elevation of 6000 feet (Sto//). 
d. codostylus: sculptura minus expressa. 
? Bulimulus iodostylus, Pfr. P.Z.S. 1861, p. 23°; Malak. Blatt. xi. p. 13 (1864)*°; Monogr. Helic. 
Vivent. vi. p. 48”. 
? Bulimulus (Scutalus) iodostylus, Fisch. & Crosse, Miss. Scient. Mex., Mollusca, i. p. 589”. 
Bulimulus iodostylus, Strebel, Beitr. Mex. Land- und Siissw.-Conch. v. p. 70, t. 12. figg. 8a, 84”. 
Hab. S.W. Mexico: Santa Efigenia, Tehuantepec (Swmichrast 1°). 
Dr. O. Stoll states, in his MS. notes, that this species is very common at the above- 
mentioned elevations, but apparently does not occur on the most elevated ridges 
between Totonicapam and Tecpam, nor lower than 6000 feet on the terraces of the 
Cordillera at Santa Maria and San Martin. In dry weather it conceals itself on the 
lower face of blades of grass, but during and after rain it creeps about freely. 
The relative proportion of the breadth to the length of the shell is very variable, as 
is also the size in this species. Its chief characteristics are the coarse plaits of the last 
whorl, the preceding whorls being remarkably smoother, and the rose-colour of the 
apertural wall and of the columella. The last-mentioned character distinguishes it— 
with few exceptions—from 0. sulcosus, which is the corresponding form in the elevated 
plain of Central Mexico. The rose-colour, however, is somewhat variable: it is never 
wanting, and more or less intense on the upper half of the columellar margin, and 
extends sometimes upwards on to the parietal wall and beneath to near the base of the 
aperture ; in some specimens the whole interior of the aperture is pale rose-coloured, 
and a stripe which on the outside is dark brown appears in the interior intense reddish- 
brown. 
The living animal is described by Dr. O. Stoll as follows :—« Body broad, bulky, 
