27 



16. ACHATINA LAYARDI, Pfr. (PI. XLIII. fig. 5.) T. SUbfusi- 



formi-ovata, tenuis, longitudinaliter 'plicatula, strigis plum- 

 beo-fuscis et rufis necnon maculis crebris fuseis scepe pallide 

 cinctis ornata ; spira conica, obtusula ; sutura leviter margi- 

 nata, subcrenata ; anfr. fere 8 convexiusculi, superi leviter 

 decussati, ultimus spiram superans, ventrosus, basi attenuatus ; 

 columella leviter arcuata, subtorta, late truncata, purpurea ; 

 apertura parum obliqua, angulato-ovalis, intus ccerulescenti- 

 margaritacea ; perist. simplex, marginibus callo purpurascente 

 junctis, dextro intus rubro-limbato. 



Long. 139, diam. 66 mill. 



Hab. Oibo, East Coast of Africa (Mr. Layard). 



1 7. AcHATiNA FULGENS, Pfr. T. oblongo-ovattt, solidula, Icevi- 

 gata, pellucida, nitida, corneo-fulva ; spira ovato-conica, apice 

 obtusula ; anfr, 6 convexiusculi, ad suturam anguste margina- 

 tam striatidi, tdtimus ^ longitudinis subcsquans, basi rotunda- 

 tus ; columella perarcuata, albo-callosa, oblique sublate trun- 

 cata ; apertura verticalis, sinuato-elliptica ; perist. rectum, 

 obtusum. 



Long. 12|^, diam. 5| mill. 



Hab. Unknown. 



18. Oleacina boucardi, Pfr. T. ovato-oblonga, tenuis, Icevi- 

 gata, nitida, pellucida, fulvo-cornea, varicibus nonnidlis leviter 

 impressis castaneis, antrorsum pallide marginatis, instructa ; 

 spira conica, obtusa ; anfr. 6 convexiusculi, ad suturam anguste 

 marginatam breviter plicati, tdtimus spiram subcsquans ; colu- 

 mella subtorta, basi breviter truncata ; apertura verticalis, 

 sinuato-semiovalis ; perist. simplex, margine dextro antrorsum 

 arcuato. 



Long. 13, diam. 6 mill. 



Hab. S. Martin, Mexico {M. Boucard). 



19. Cyclostoma stTBCONicuM (Leptopoma), Pfr. T. angus- 

 tissime umbilicata, globoso-conica, tenuis, liris filiformibus sub- 

 confertis cincta et striis lamellaribus oblique decussata, vix ni- 

 tidula, castaneu, ad suturam luteo-flammidata ; spira conica, 

 acutiuscula ; anfr. 6 convexi, ultimus sjnra brevier ; apertura 

 parum obliqua, ovali-rotundata, intus ccerulescenti-margari- 

 tacea ; perist. tenue, vix expansum, marginibus approximatis. 

 Operc. 1 



Diam. maj. 8^, min. 7^5 alt. 7 mill. 



20. Cyclostoma principalis (Cyclostomus), Pfr. (PI. XLIV. 



fig. 7.) T. aperte et mediocriter umbilicata, globoso-turbinata, 

 solidula, liris subacutis, crebris cincta, albida, fasciis 2 vio- 

 laceo-fuscis infra medium ornata; spira gradato-conica, ver- 

 tice minuto, acutiusculo ; anfr. 5 convexi, ultimus basi et in 

 umbilico liris cequalibus subdistantibus munitus ; apertura pa- 



