RUB-ORDER B 



PLATYPODA 



477 



longitudinally striau-d 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 

 -traight and very long canal; inner lip with a fold. ( 'n-iarc. in- 

 to Recent. 



Strepsidura, Swains. (Fig. 970). Spire short; body whml 

 in Hated, transversely ribbed; canal curved. Eocene and Miocene. 



Fio. 970. 



Strepsidura ficulnea, 

 i.am. CalcaireOroMier; 

 , m>ar Epernay. 



Family :i. Muricidae. Try on. 



Shell thick. Spire moderately high; whorls ivith 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. 

 Opereulwn horny. Cretaceous to Recent. 



Mitrcx, 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. 



Fio. 971. 



Fit;. 973. Fio. 974. 



'''"' 972> Mum (I'tfronotus) T)i,<^'' 1l>if,-r. 



tirex spinicosta, Bronn. tricarinatiis, Lam. Montf. Calraiiv 



/, Midit. Miocene ; Baden, near Eocene ; Damery, near Gmssifi ; Crii;- 



Miocene] Gainfahrn', near Vienna. Vienna. Epernay. non, near I'aris. 



Sub-genera: Haustellum, Klein; fthinacantha, Adams; Chicoreus, PhyJlonotus (Fig. 971), 

 Montfort; Pteronotus, Swainson (Triplex, Perry), (Fig. 973); Ocinebra, Leach, etc. 



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, 



