SUB-ORDER B PLATY PODA 48] 
The typical genus Harpa, Lam. (Silia, Mayer), (Fig. 989), ranges from the Eocene 
to the present time. 
? Harpopsis, Mayer (Cryptochorda, Morch), 
(Fig. 990). Elongate-oval ; spire short, body 
whorl large, smooth, lustrous. Aperture 
with short recurved canal; inner lip callous. 
Common in the Eocene. 
Family 9. Olividae. dOrbigny. 
Shell elongate-oval to sub-cylindrical, solid, 
smooth, and glistening. Spire short; body 
whorl very large. Aperture narrow; outer 

lip sharp ; columella anteriorly with an out- Fic. 990. 
xr. 989. : . 
wardly reflected callus. Canal very short. my Harpopsis stromboides, 
: Harpa mutica, Lam. Lam. sp. Calcaire 
Nin =| ’ 
Cretaceous to Recent. Caleaire Grossier; Grossier; Damery, 
Grignon. near Epernay. 
Oliva, Brug. (Fig. 991). Shell  sub- 
cylindrical ; suture line marked by a deep groove. Columellar callus obliquely folded. 
Cretaceous to Recent. 
Ancilla, Lam. (Ancillaria, Lam.), (Fig. 992). 
Shell oblong, occasionally acuminate. Suture 
usually covered over by a lustrous enamel-like 
callus. Aperture somewhat broadened anteriorly ; 
columellar callus slightly twisted. Cretaceous to 
Recent. 
Superfamily 5. TOXOGLOSSA. Troschel. 
Radula typically with only two arrow-shaped 

99 ‘1G. 992. AeA reer ates 
mae es Ey teeth in each transverse row, although occasionally 
Oliva clavula, Lam. Ancilla glandi- ee catate ag ote WR Y eco ae 
Miocene; Dax, near formis, Lam. Mio. @S many as five teeth are developed. Shell simala 
Bordeaux. cene; Steinabrunn. fo that of the Rachiglossa. 
This group is closely allied to the Rachiglossa, from which it probably became 
differentiated in the Cretaceous. The Tertiary and 
Recent species are excessively profuse. All are 
carnivorous and marine. 
Family 1. Cancellariidae. Adams. 
Shell oval to turreted. Spire acuminate; body 
whorl inflated ; surface transversely ribbed and vn most 
cases cancellated. Aperture with short canal or notch ; 
columella, with several strong oblique folds, outer lip 
grooved internally. Upper Cretaceous to Recent. 

Cancellaria can- 
The typical genus Cancellaria (Fig. 993) attains cellata, Linn. Mio- 
° “ 3 5 ° : ne: Gainfahr 
a maximum distribution in the late Tertiary and (0), Gantahrn, 
Recent. 

Family 2. Terebridae. Adams. 
MIG. 994. . eo : 
; ; Shell turreted, slender, acuminate, with small body whorl. Aperture 
Terebra acuminata, p “8 . 
Borson. Miocene: Vl or quadrilateral ; canal short, curved ; outer lip sharp.  Oper- 
Baden, near Vienna. culwm horny. Tertiary and Recent. 
Of the two leading genera, Terebra, Lam. (Fig. 994), and Acus, Humphr., the first 
VOL. I 21 
