Zoological Society. 69 



Melania coxtlus. M. testd minute et crebrissime striata", co- 

 nicd, svbtenui, fused : spird obtusd; suturis linearibus ; anfrac- 

 tibus septem, planulatis, uno-vittatis ; aperturd ehnoato-ovatd, 

 ad bash* angulatd, intus fused; columella tortd. 

 Hab. Small streams, Fernando Po, "West Africa. 

 Length l - 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 tines 

 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 obruta. 3/. testd striata, conoidea, crassd, bhrittatd, 

 fused; spird subelevatd; su tun's impressis ; anfractibus septem, 

 convexiusculis, lineis crebris elevatis ; aperturd parvuld, sub- 

 pat uld, intus alba et bhrittatd, ad bash* emarahtatd et retusd; 

 labro crenulato et arcuato. 



Hab. 1 



Length 1 "3, diam. '5 of an inch. 



Remarks. — In general form and outline this species is very like to 

 the striate variety of Jf. Virginica, Say. It differs in being thicker 

 and in having a crenulate and patulous tip. 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 sheik is very much curved on the edge of the tip, and disposed 

 to be canaliculate at the base. The striae are coarse and elevated. 



Melania TCRRicrLrs. 3/. testd striata, conoidea, svbtenui , 

 obscure maculatd, corned, spird subelevatd; suturis imp re ssi s; 

 anfractibus novem, converiusculis, lineis subraris i m pr e ssis , su- 

 peme angulatis ; aperturd pared, subconstrictd, intus albidd et 

 obscure maculatd, ad bash* rotunda; columella reoulariter ewr- 

 vati. 

 Hab. Small rivers, Calanang, province of Bai, Luzon, Philippines. 

 Length l - 2, diam. *4 of an inch. 



Remarks. — This species, like M. obruta, resembles in size and 

 outline very closely 3/. Firaimca, 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 aranosd, 

 rufo-eastancd ; spird obtusd; suturis irregulariter impressis; an- 

 fractibus convexis, lineis paucis elevatis; aperturd pared, sub- 



