190 
Melania contjlus. M. testd minute et crebrissime striatd, co¬ 
rned, subtenui, fused; spird obtusd; suturis linearibus; anfrac- 
tibus septem, planulatis, uno-vittatis; aperturd elongato-ovata, 
ad basim angulatd, intus fused ; columella tortd. 
Hab. Small streams, Fernando Po, West Africa. 
Length 1*4, diam. *5 of an inch. 
Remarks. —This interesting species is remarkable for its peculiar 
striae, which cover the whole surface of all the whorls. The lines 
are irregular, and so minute as to require the microscope to detect 
them. A little above the middle of the whorl there is an obscure, 
dark, rather broad band. The middle of the whorl is somewhat 
angular. The aperture is not quite one-half the length of the shell, 
and is somewhat angular below. 
Melania obrijta. M. testd striatd, conoidea, crassd, bivittatd, 
fused; spird subelevatd; suturis impressis; anfractibus septem, 
convexiusculis, lineis crebris elevatis; aperturd parvuld, sub- 
patuld, intus albd et bivittatd, ad basim emarginatd et retusd; 
labro crenulato et arcuato. 
Hab. -? 
Length 1*3, diam. *5 of an inch. 
Remarks .—In general form and outline this species is very like to 
the striate variety of M. Yirginica , Say. It differs in being thicker 
and in having a crenulate and patulous lip. In the four specimens 
submitted, the two dark brown bands are beautifully distinct inside, 
and stop short of the margin. Three specimens have a suddenly 
enlarged body whorl. Two of the specimens have obscure, longitu¬ 
dinal brown marks. The aperture is about one-third the length of 
the shell, is very much curved on the edge of the lip, and disposed 
to be canaliculate at the base. The striae are coarse and elevated. 
Melania turriculus. M. testd striatd, conoidea, subtenui, 
obscure maculatd, corned, spird subelevatd; suturis impressis; 
anfractibus novem, convexiusculis, lineis subraris impressis, su- 
perne angulatis; aperturd parvd, subconstrictd, intus albidd et 
obscure maculatd , ad basim rotundd; columelld regulariter cur- 
vatd. 
Hab. Small rivers, Calanang, province of Bai, Luzon, Philippines. 
Length T2, diam. '4 of an inch. 
Remarks.— This species, like M. obruta, resembles in size and 
outline very closely M. Yirginica, Say. It differs from the former in 
being less thick, in being maculate and not banded, and in having 
impressed lines. It differs from the latter in being maculate, and in 
being angular immediately under the suture. The aperture is rather 
more than one-third the length of the shell, angular above and 
rounded below. The operculum has its polar point somewhat re¬ 
moved from the lower margin. 
Melania apis. M. testd striatd, conicd, tenui, obscure granosd, 
rufo-castanea; spird obtusd; suturis irregulariter impressis; an¬ 
fractibus convexis, lineis paucis elevatis; aperturd parva, sub- 
