480 MOLLUSCA SUB-KINGDOM VI 
Strigatella, Swains. (Fig. 984); Cylindromitra, Fischer (Cylindra, Schum.) ; Im- 
bricaria, Schum.; Volutomitra, Gray. Tertiary and Recent. ; 
Lyria, Gray (Fig. 985). Elongate-oval, transversely ribbed. Aperture narrow. 
Yolumella anteriorly with two much compressed and very large plications, behind 
(above) which are numerous weaker ones. 
Outer margin thickened. Tertiary and Recent. 
Halia, Risso (Priamus, Beck). No columellar 
folds. Pliocene and Recent. 
Volutilithes, Swains. (Fig. 986). Shell 
fusiform, spire elongate-conical ; nucleus small, 
rising to a more or less acute apex. Whorls 
costate, typically spinose. Aperture anteriorly 
with short broad canal; columellar folds vari- 
able, several in number, those toward the 
anterior being generally the most pronounced. 
Abundant in the Cretaceous, Eocene, and 
Oligocene ; only one recent species. 
Allied genera and sub-genera: Gosavia, 
Stol.; Letoderma, Rostellites, Conrad ; Voluto- 
derma (Fig. 987), Volutomorpha, Gabb.  Cre- 
taceous. 
Athleta, Conrad. Spire short, body whorl 
inflated, posteriorly with a row of spinous 
nodes. Inner lip callous, much expanded ; 
columella anteriorly with three strong trans- 

Fic, 984. 
Strigatella labratula, 
Lam. sp. Eocene; 
Grignon. 

Fic. 985. Fic. 986. verse folds, behind (above) which follow a few 
Lyria modesta, A Volutilithes bicorona, weaker ones. Outer margin thickened. Eocene 
Braun. Oligocene ; Lam. Eocene; Cour- é 
Weinheim. tagnon, near Epernay. and Miocene. 
Voluta, Linn. (Fig. 988). Shell elongate- 
oval or fusiform, solid, broad, and with elevated, turbinate, smooth nucleus. Spire 
short, longitudinally plicate, the folds being 
elevated into obtuse tubercles on the base of 
the whorls. Aperture narrow, canaliculate 
behind and broad in front; inner margin 
often covered by a thin callus. Columella 
carrying many plaits, four or five of which 
are prominent, the remainder much smaller. 
Tertiary and Recent. 
Sub-genera: Fulgaria, Schum. ; Scapha, Gray 
(Fig. 988); Volutella, @Orb. ; Aurinia, Adams 
(Volutifusus, Conrad), ete. 
Musica, Humphrey. Spire short, nucleus 
small. Aperture narrow, inner lip callous, 
with numerous transverse folds ; outer margin 
thickened. Tertiary and Recent. 

Fic. 987. 

Volutilithes (Volu- 
toderma) elongata, 
Fia. 988. 
Cymbium, Klein (Yetus, Adams Melo, avOrb. Gosau-Cre- Voluta (Scapha) m uricina, 
: tae age . taceous ; St. Gilgen, Lam. Caleaire Grossier ; 
Humph.). Cretaceous to Recent. uantrial Damery, near Epernay. 
Family 8. Harpidae. Troschel. 
Spire depressed ; body whorl inflated, with sharp, uniformly spaced transverse ribs. 
Aperture wide, with short, broad canal. Inner-lip callous. Operculwm absent. Tertiary 
and Recent. 
