CISTULA $. 6. 913 
24. €. Largilliert? EPfr. 
T. perforata, oblonga, decollata, tenuiuscula, costis con- 
fertis, argute elevatis longitudinaliter sculpta, iterstitiis lineis 
spiralibus sub lente decussata, fulvida, maculis fuscis, seriatis 
obsolete ornata; sutura profunda, denticulata; anfr. superst. 4 
convexi, ultimus antice breviter solutus; apertura verticalis, 
oblique subovalis; perist. duplex : internum simplex, externum 
breviter expansum, marginibus superne angulatim junctis. — 
Opere. normale. — Long. 12'/, diam. 6 mill Ap. intus 4 
mill. longa. (Coll. Nr. 196.) 
Cyclostoma Largillierti Pfr. in Zeitschr. f. Malak. 1846. p. 46. 
— — Chemn. ed. I1 N. 125. p. 121. t.-14. f. 26. 27. 
Choanopoma Largillierti Gray Catal. Cycloph. p. 51. N. 14. 
Cistula. Largillierti Pfr. Consp. N. 403. 
Habitat Yucatan (Largillert). 
448 
25. €.? fallax Pfr. 449 
T. rimata, oblongo-turrita, truncata, tenuis, spiraliter 
obtuse lirata, lineis longitudinalibus confertioribus (octava vel 
decima quavis sub lente validioribus) decussata, non scabra, 
vix nitidula, albida, lineis flexuosis, interruptis fulvis picta; 
spira subconvexo-turrita; sutura minute fasciculato - crenata ; 
anfr. superst. 4—4'/, convexiusculi, ultimus rotundatus, infra 
medium fascia fulva ornatus, antice longe solutus, circa rimam 
umbiliealem vix spiraliter suleatus; apertura subverticalis, 
ovalis; perist. album, duplex : internum expansiusculum, incum- 
bens, externum breve, undique subaequaliter patens, superne 
angulatum. — Operc.? — Long. 14, diam. 6'/, mill. Ap. 
intus 4'/, mill. longa, 3?/, lata. (Mus. Cuming.) 
Cyclostoma fallax Pfr. in Proc. Zool. Soc. 9 Dec. 1851. 
— -—  xXChemmn. ed. IH. N3:369:30; 45. f. 91. 929. 
Cistula? fallax Pfr. Consp. N. 404. p. 68. 
Habitat^. «: :? 
Obs. Haec species C. lineolatae Lam. valde affinis videtur. 
26. €.? sericina Adams. 7 450 
T. perforata, valde elongata, conica, lineis longitudina- 
libus obtusis subtiliter elevatis confertim sculpta, sericea, alba, 
seriebus 4. macularum fuscarum et quinta basali minus dis- 
tincta pieta; spira modice curvilinearis; sutura profundiuscula ; 
anfr. superst. 4'/, convexi; apertura breviter soluta; perist. 
duplex :internum | indistinctum , externum modiee expansum, 
18 
