84 MOLLUSCA. 
south it is more restricted, only one species being found in South America, viz. S. sud- 
callosa, Pfr., in Venezuela. Pfeiffer quotes another from Peru, S. peruviana (Lam.) ; 
but this very fine species seems to be more nearly allied to the subgenus Varicella of 
Glandina, especially to G. leucozonias, and its habitat in Peru is, so far as I know, not 
confirmed by any later traveller. 
Geographical Distribution of the Species of Streptostyla. 
N. Mexico ... . . . +. No species hitherto known. 
N.E. Mexico. . . . .... » 
N.W. Mexico .....e. - » 
Central Mexico. . ..... - 
E. Mexico. . . . . . . « «~~ métcoleti, botteriana, mitreformis, delattrei (varr.edwards- 
tana and sallet), irrigua, shuttleworthi (with varr.), 
cylindracea, coniformis, turgidula, lurida, plicatula, 
flavescens, fulvida, glandiformis, physodes, limnei- 
formis, vexans, boyeriana, mohriana, ligulata. 
W.&S.W. Mexico. . . . . . ~~ shuttleworthi var. similis, conulus, flavescens var. 
boucardi. 
Tabasco and Central Chiapas . . dubia, nigricans, shuttleworthi, biconica, lurida var., 
limneiformis var. parvula, oblonga, ligulata, catenata. 
Yucatan . . . . . . . ~~) cylindracea, ventricosula, meridana. 
N. Guatemala. . . . . . . . nigricans, mitreformis, delattrei, turgidula var., 
labida, lurida, delibuta, meridana var. cobanensis, 
sargi, ligulata. 
Central Guatemala. . . . . .  sololensis, ventricosula var. binneyana. 
E.Guatemala . ... . . .  delattrei, delibuta. 
S.Guatemala . . . . . . . = turgidula var., meridana var. cobanensis. 
Honduras. . . . . . . . «  obesa, thomsoni, dysoni. 
Salvador . . . . .. . . . No species hitherto known. 
S.W. Nicaragua . » 
Central Nicaragua. . . . . . dysoni. 
Mosquito coast . . . . . . . No species hitherto known. 
N. Costa Rica . . . . . . . Umitreformis, ? cylindracea, turgidula, ventricosula var. 
S.& S.E. Costa Rica . 2. . . . binneyana, viridula, ? flavescens var. boucardi. 
N. Panama .... . =... Nospecies hitherto known. 
S. Panama 
33 
Venezuela. . . . . . . . . ~~ gubcailosa. 
