STENOQTBA. 



231 



Fig. 392. 



Stetioffyra 

 svbrda. 



obtuse summit, the last whirl less than one-third the length of the shell ; 

 suture deeply impressed ; columella nearly straight ; aperture 

 elongated, narrow, rhomboid-elliptical ; peristome simple, its 

 right margin straight, its columellar margin slightly reflexed, 

 protecting a minute umbilical perforation. Length of axis 13 

 mill., diameter about 3 mill. 



Achatina subula, Pfeiffek, Wiegm. Archiv. 1839, I, 352. 

 Bulhiius subula, Pfeiffek, Symbolae, I, 85 ; 5Ion. Hel. Viv. II, 

 158.— BiNSEY, Terr. Moll. II, 285, pi. liii, f. 4.— W. G. 

 BiNNEY, Terr. Moll. IV, 134.— Reeve, Con. Icon. f. 494. 

 Bulimus octonoides, D'Okbigny, Moll. Cub. I, 177, tab. xi, f. 

 23, 24 ; pi. xi bis, f. 22-24, 

 Bulimus jirocerus, Adams, Proc. Bost. Soc. Nat. Hist. II, 13. 

 Bulimus liortensis, Adams, vid. Contr. to Couch, p. 221. 



Found at Ft. Dallas, Florida (Cooper), and in several of the 

 West India Islands, Cuba, St. Thomas, Jamaica, Porto Rico. 

 Also at Chiapa, Mexico {Pfeiffer). 



This species belongs to a somewhat numerous group found in 

 the tropics, wherever the banana and other Musaceae flourish ; 

 some of which have the columella truncated, and were formerly 

 arranged under the genus Achatina, like S. octona, though by 

 their natural affinities they are clearly associated. The banana 

 and plantain have, by transplantation, become naturalized 

 throughout the tropics; and it is highly probable that many 

 shells found with them, which have received different names 

 merely because they have been found in localities far remote 

 from each other, are really identical. This shell is considerably 

 smaller and more rapidly tapering than S. octona, which has its 

 columella somewhat truncated, and has not as yet been found on 

 this continent. 



Cat. No. No. ofSp. 



Locality. 



Prom whom received. 



S710 



Florida. 



W. G. Binney. 



Subgenus MELANIELLA, Pfr. 

 Shell imperforate, ribbed, usually decussated, sculptured, 

 brownish horn-colored, rather solid ; whirls 9 rather convex, 

 graduated, the three or four upper ones without ribs ; aperture 

 effuse at base, ovate ; columella constricted ; peristome simple, 

 subcontinuous. 



