94 LEUCOZONIA. 



Undetermined Species. 



L. ZEA, Morch, Yoldi Catalogue. Not described. 

 L. NEGLECTUS, A. Ad. China. 



L. ARMATUS, A. Ad. California: 



L. FLAVIDUS, A. Ad. Philippines. 



L. ELEGANS, A. Ad. Hab. ? 



L. DISTINCTUS, A. Ad. Nab. ? 



L. STRANGEI, A. Ad. Sydney, Australia. 



None of the above are figured, nor are dimensions and dis- 

 tinctive characters given. 



Genus LEUCOZONIA, Gray. 



The most prominent character of this genus, when present, is 

 the tooth which arises from the fore-part of the outer lip. It 

 varies greatly in its development in the different species. In 

 L. cingulata, in which it is always present, it is long, curved and 

 tusk-like, so that the species has been erroneously arranged with 

 Monoceros, from which it is instantly distinguished by its claw- 

 like operculum and columellar plaits. In the other species it is 

 sometimes entirely absent in some specimens, whilst well-devel- 

 oped in others. There is usually a posterior subchannel to the 

 aperture. The sculpture does not vary essentially from that of 

 the species of Latirus, but the color is usually a chestnut-brown, 

 the only ornamentation being lighter or darker revolving bands. 

 Usually the species are prominently shouldered ; those which 

 have whorls rounded above constitute the sub-genus Lagena 

 which may be conveniently retained for them. 



L. CTNGULIFERA, Lam. PI. 70, figs. 165-173. 



Chestnut-brown, encircled below the periphery by a white 

 callous raised band, terminating in a tooth on the outer lip ; 

 apperture white, bluish or yellowish within. 



Length, l-2'5 inches. 



Mouth of the Gambia, W. Africa ; West Indies ; 



Florida; Brazil. 



The specimens said to come from W. Africa are the largest, 

 but I have never seen any which can be referred to that locality 

 without doubt. The species is variable in its proportions and in 

 the prominence of its sculpture and has therefore received several 



