120 HELICEA. 



Biscayne, Florida. The variety described on page 273 is 

 figured on pi. 77, fig. 13. 



Agatina fuscata Rafinesque (vol. i. p. 50) is to be added 

 to the synonymy. 



BULIMUS SERPERASTRUS Say vol. ii. p. 274, pi. 1. fig. 2. 



Bulimus serperasfrns Say (Binney's ed.) p. 39. 



Chemnitz, ed. 2, p. 82, pi. xxx. fig. 122; pi. xxxix. fig. 5, 



(1854). 

 Pfeiffer, 1. c. iii. 341. 

 Philippi, Icon. iii. 23, p. 97, tab. 9, fig. 6. 

 j3 Gracilior, spira elongata. 



Bulimns Liebmanni Pfeiffer. 

 Bulimus Ziehmanni Reeve. 

 y. Minor, imperfechis. 



Bulimus nitelinus Reeve. 



The above varieties are given solely on the authority of 

 Pfeiffer. 



The geographical distribution of the species doubtfully 

 quoted by Gould as synonyms seem to remove the proba- 

 bility of their identity with this shell. 



BULIMUS ALTERNATUS Say vol. ii. p. 276, pi. li. fig. 2; pi. Ii. a; 



pi. Ixxx. fig. 3; fig. IV 

 Bulimus ulternatus Say (Binuej^'s ed.) p. 39. 



Pfeiffer, Mon. Hel. Viv. ii. 221. 

 Bulimus Inctarius Pfeiffer, 1. c. ii. 187; iii. 415. 



Reeve, 1. c. No. 217. 



Gould, Ter. Moll. iii. p. 35. 

 Bulimus dealbaius Binney, 1. c. pars, nee Say. 



There exists a great deal of confusion in regard to this 

 and the allied species. 



Bulimus alternatus is thus described by Say : — 



Bulimus alternatus. Ovate conic, with alternate gray and 

 brownish longitudinal vittae. Inhabits Mexico. 



Shell urabilicated, ovate-conic, with longitudinal lines, subequal, 

 gray and light brownish vittae ; the brown is paler, almost approach- 

 ing in some instances a drab ; the white vitti^ consists of more or 



