CLASS IV 



GASTROPODA 



503 



is characterised by a line running parallel with the suture, and creating a narrow 

 suture band. JJuplicaria Dall has the suture channelled. 



Family 3. Turritidae Adams {Plexhrotomidae Stoliczka). 



Shell fusiform, with moderately high spire. Aperture elongated, j)roduced anteriorly 

 in a longer or shorter canal. Outer lip with a slit or notch below the suture. Operculum 

 horny, sometimes absent. Cretaceous to Recent. 



Upwards of 700 recent and 1000 fossil species have been described, of which 28 

 are Cretaceous. 



Turris Bolten (Pleurotoma Lam.) (Figs. 1044-1047). Shell turriculated, spire long. 



A B ' C A B 



Pig. 1044. 



A, Turris noiata (Brocchi) var. {=T. monilis 

 Hoernes). Miocene ; Baden, near Vienna. B, T. (Sur- 

 cula) Iwmarcki Bell. Miocene ; Baden, near Vienna. 

 C, T. {Surcula)'hclgica Nyst. Oligocene ; Weiuheim, 

 near Alzey. 



Fig. 1045. 



A, Turris (Genota) ramosa Bast. 

 Miocene ; Grund, Hungary. B, 

 T. (Cryptono7ms)fllosa (Lam.). Cal- 

 caireGrossier; Grignon, near Paris. 



Body whorl of nearly equal length with the spire ; canal long and straight ; columellar 

 margin smooth. Outer mar- 

 gin of the aperture with a 

 narrow, deep sinus, situated 

 at or some distance below the 

 suture. Operculum pointed 

 ovate, with ajaical nucleus. 

 Cretaceous to Recent. 



Subgenera : 



Surcula (Fig. 

 1044, B, C) ; Genota Adams 

 (Fig. 1045, A) ; Bathytoma 

 Harris (Fig. 1046) ; Oligotoma, 

 Eouaultia Bellardi ; Cryjito- 

 C071US V. Koenen (Fig. 1045, B) ; 

 Drillia (Fig. 1047) ; Bela Gray ; 

 Lachesis Risso, etc. 



Glavatula Lamarck (Fig. 

 1048). Differs from Turris 



Fig. 104T. 



Turris (Drillia) 

 incrassata Duj. Mio- 

 cene ; Steinabnmn, 

 near Vienna, -/i. 



notch, and the nucleus of the 



operculum is situated in the middle of the anterior margin 



Suljgenera : Pseudotoma, Glinura Bellardi. 



Turris (Bathytoma) 

 proper in that the outer margin cataphracta Brocchi. 

 . , 1 Ti J • 1 Miocene ; Baden, near 



is cut by a shallow triangular Vienna. 



Pig. 1048. 



Clavatula asperulata 

 Lamarck. Miocene ; 

 Grund, Hungary. 



Cretaceous to Recent. 



