632 SUPPLEMENT. 
CentraL Costa Rica: San José, 1161 metres, and Cartago, 1442 metres, var. obesus 
(Biolley 12) ; El Tablazo, white specimens (Biolley !”). 
W. Costa Rica: San Mateo, 200 metres (Biolley 12). 
Biolley !2 states that the var. citronellus is the commonest form of O. sulfureus in 
Costa Rica, but that as it ascends the coloration becomes duller. Pilsbry | Nautilus, x. 
p. 59 (1896)] mentions a peculiar variety from San Rafael, Jicaltepec, E. Mexico, with 
five reddish bands, the umbilical and basal continuous, those above interrupted and 
forming square spots. Is this 0. emeus? 
Otostomus alternans (p. 230). 
Otostomus alternans, Biolley, Mol. terr. y fluv. de Costa Rica, p. 14”. 
To the localities given, add :— 
Hab. [N. Guatemata:] Sabo in Vera Paz (Champion). 
[CenTRAL GUATEMALA :] Capetillo, near Antigua (Champion). 
[CentraL Costa Rica :] San José, 1161 metres, and Cartago, 1442 metres (Biolley?9). 
W. Costa Rica: Valley of Diquis, near Terraba, 100 metres (Pittier). 
BULIMULUS (p. 238). 
Bulimulus schiedeanus (p. 239). 
Bulimulus schiedeanus, Binney, Bull. U.S. Nat. Mus. xi. no. 8, p. 160, t. 3. fig. K (jaw and radula) 
(1883) *, 
Bulimulus alternatus (p. 243). 
For further particulars concerning this species, see also Stearns, Proc. U.S. Nat. Mus. 
xiv. p. 99 (1891). 
Dall [ Proc. U.S. Nat. Mus. xix. p. 357 (1896)] describes a var. nigromontanus from 
the summit of the Black Mountain, Sonora. 
Bulimulus corneus (p. 246). 
Bulimu/us corneus, Biolley, Mol. terr. y fluv. de Costa Rica, p. 15". 
To the localities given, add :— 
Hab. [E. Costa Rica:] Turrialba (Biolley }*) ; Moin Hill, near Limon (Pittier). 
W. Costa Rica: San Mateo (Biolley 1°); Turubares, 200 metres (Biolley) ; Lagarto, 
on the banks of the Rio Diquis (Pittier). 
Biolley 1° states that this species is generally found on the ground, whereas the 
brighter-coloured Otostom? live on trees. 
