128 HELICEA. 



him. It appears that he had the true alternatus before 

 him in describing B. lactarius as follows : 



T. rimata, vel perforata, ovato-acuta, palidissime fulvida, strigis lacteis, 

 opacis, longitunalibus, denticulatis et fimbriatis ornata ; spira conica, 

 acuta ; anfr. 7 convexiusculi, ultimus spiram subaaquans ; apertura ovalis ; 

 perist. simplex, acutum, marginibus callo junctis, columellari dilatato, re- 

 flexo. (Pfr. in Symb. iii. 85.) 



Reeve also describes and figures the species as B. lacta- 

 rius. 



BULIMUS MARINE ALBERS. 



T. anguste umbilicata, oblongo-conica, solida, sublsevigata, alba, punctis 

 et strigis obsoletis corneis plerumque notata ; spira conica, acuta ; anfr. 

 6^ convexiusculi, ultimus spiram subaequans, basi vix attenuatus; colu- 

 mella plica parvula, dentifbrini munita ; apertura vix obliqua, acuminato- 

 oblonga, intus fusca ; perist. rectum, margine dextro leviter arcuato, 

 columellari sursum dilatato, patente. Long. 33, diam. 14-15 mill. ; ap. 

 16-1 7 mill, longa, 7 lata. 



/?. Anfr. superis corneis, lacteo punctato-strigatis, ultimo strigis lacteis 

 denticulatis et violaceo-corneis alternantibus picto. 



Hab. Texas. 



This description was published by Pfeiffer in Proc. Zool. 

 Soc. London, 1858, p. 23. The species must be nearly 

 allied, if not identical, with some of the varieties of B. al- 

 ternatus, but I have not seen any authentic specimen. 



BULIMUS BINNEYANUS PFEIFFER. 

 PLATE LI. b. 



The shells figured on the plate referred to were con- 

 sidered as a variety of dealbatus by Binney (ii. 277), and 

 as B. Schiedeanus by Gould (ii. 279). Having sent speci- 

 mens to Pfeiffer for identification, they were returned to 

 me labelled B. Binneyanu*, with the remark that the true 

 B. Schiedeanus has no tooth-like plate on the columellar. 



The shell described by Pfeiffer (Mai. Blatt. iv. 229) does 

 not appear to be identical with our Texan shell. We 



