370 SMITHSONIAN MISCELLANEOUS COLLECTIONS [von. 48 
coloration of the shell fades with time ; the specimens in the National 
Collection are much less vividly colored than when received in 1887. 
Genus MACULOPEPLUM Dall 
Maculopeplum Daz, Nautilus, xrx, no. 12, p. 143, April, 1906. 
Scaphella (sp.) Swatnson, Zool. Ill., 2d ser., 11, no. 19, 1832. Not typical 
Scaphella SwAInson. 
Caricella (sp.) Conrap, Journ. Acad. Nat. Sci. Phila., 2d ser., 1, p. 120. 
Scaphella Dati, Bull. Mus. Comp. Zool., xvi, p. 147, 1889; Trans. 
Wagner Inst., 111, p. 79, 1890. 
This genus is closely related to Aurimia, and for some time I hesi- 
tated as to separating them generically. However, they represent 
diverging lines of descent from Caricella and I concluded that there 
was less chance for confusion in a clean-cut separation than in a 
subgeneric connection. 
The group differs from Awurinia in its preservation of normal char- 
acters, such as the solid and substantial shell, and well developed 
columellar plaits, the anterior stronger. It agrees with that genus 
in starting with a membranous protoconch, which is afterward lost; 
in having no radula or operculum ; and in its style of coloration. 
The observations on the animal are based on a specimen about an 
inch long, of which the shell was slowly dissolved by weak acetic 
acid, and the soft parts thus obtained without injury to their con- 
tinuity. The type is the well-known species Voluta junonia Hwass. 
In my work on the Volutes in the Tertiary Fossils of Florida, I 
made no attempt to revise the nomenclature of the group upon which 
so many naturalists had worked, and accepted without investigation 
the current nomenclature except in the case of Aurinia. Investi- 
gation, however, has shown that this was unwise, and especially in 
the case of Scaphella Swainson. While Voluta junonia was included 
among his species of Scaphella, it is obvious to the careful student 
that it cannot be regarded as congeneric with the forms like V. undu- 
lata, which was the type of Scaphella, and which were later named 
Amoria by Gray; nor with the Cymbiola group, founded on V oluta 
vespertilio, which is the Scapha of Gray and Aulica of Adams and 
Crosse. Both of these groups have the shelly protoconch of the 
Volutine. A new name was therefore necessary. 
MACULOPEPLUM JUNONIA Hwass 
Voluta junonia Hwass, in Chethn. Conch. Cab., x1, 1795, p. 16, pl. 177, 
figs. 1703 1704; LAmaArcK, Ann. du Museum, vil, p. 70, 1811; SwAIn- 
son, Exotic Conch., 2d ed., p. 22, pl. xxxitr, Jan., 1835; SoweErsy, 
Thes. Conch., 1, p. 197, pl. xix, fig. 44, 1847; Reeve, Conch. Icon., 
Voluta, pl. xx, fig. 50, 1849. 
