SUB-ORDER B PLATYPODA 477 
longitudinally striated and beset with nodes or rows of spines. Inner lip smooth ; 
aperture gradually becoming merged into the short and wide 
canal. Tertiary and Recent. 
Fulgur, Montfort (Busycon, Bolten). Tertiary and Recent. 
Tudicla, Bolten (Fig. 969). Resembles Fulgur, but has a 
straight and very long canal; inner lip with a fold. Cretaceous 
to Recent. 
Strepsidura, Swains. (Fig. 970). Spire short; body whorl 
inflated, transversely ribbed ; canal curved. Eocene and Miocene. 

Fic. 970. 
Lance ee opie rts Strepsidura — ficulnea 
Family 3. Muricidae. Tryon. Lam. Caleaire Grossier : 
te : wee : : Damery, near Epernay. 
Shell thick. Spire moderately high; whorls with transverse 
swellings, ribs, or folia, and frequently spinose. Aperture rounded or oval; canal more 
or less elongated, wholly or partially covered by margins of the inner and outer lips. 
Operculum horny. Cretaceous to Recent. 
Murex, Linn, (Figs. 971-973). Shell rounded, spire prominent. Surface with at 
least three, often more than three varices or transverse rows of spines or nodes on each 
whorl Aperture ovate; inner lip smooth, outer lip 
thickened. Canal much prolonged, partially closed, 
usually spinose. Cretaceous to Recent. 

Fie, 973. Fic. 974. 
Murex (Pteronotus) Typhis tubifer, 
Murex spinicosta, Bronn. tricarinatus, Lam. Montf. Calcaire 
Murex (Phillonotus) Sedgwicki, Micht. Miocene; Baden, near Eocene; Damery, near Grossier; Grig- 
Miocene ; Gainfahrn, near Vienna. Vienna, Epernay. non, near Paris. 
Fic. 972. 
Fic. 971. 
Sub-genera: Haustellum, Klein; Rhinacantha, Adams ; Chicoreus, Phyllonotus (Fig. 971), 
Montfort ; Pteronotus, Swainson (T'riplex, Perry), (Fig. 973) ; Ocinebra, Leach, ete. 
Typhis, Montf. (Fig. 974). Like Murex, but with hollow spines. Canal short, 
completely closed. Upper Cretaceous to Recent. 
Trophon, Montf. Spire high. Longitudinal ribs replaced by thin lamellae. 
Canal open, somewhat curved. Tertiary and Recent. 
Family 4. Purpuridae. Gray. 
Shell thick, usually ovoid ; spire short, body whorl large. Aperture wide, inner lip 
and columella more or less flattened ; canal short. Operculum horny. Cretaceous to 
Recent. > 
Purpura, Brug. (Fig. 975). Imperforate; body whorl with transverse ribs or 
nodes. Aperture oval, columella flattened, smooth. Tertiary and Recent. 
