PTEROPODA. 



211 



The shell exactly resembles a scissor-sheath. 



Conularia. Miller. — Shell conical; straight or nearly 

 so; divided into chambers by imperforate 

 septa; aperture half closed; apex solid, 

 obtuse ; external surface finely striated. — 

 15 species fossil (Gray). 



Resembling Orthoceras, but wanting the 

 siphon. * 



Coleoprion. Sanberger. — Shell tubular^ cwana, 

 gradually pointed, surrounded by oblique rings of growth, 

 alternately grasping each other, open lengthwise ; the inner 

 surface of the tube is smooth. — 1 species, fossil. 



Pugitjnculus. Barrande. — Shell pyramidal, elon- 

 gated ; a section forms a nearly equilateral triangle, the 

 sides bulging, and the apex blunt ; the aperture with a 

 slightly curved border, more or less oblique to the axis of 

 the length. — Fossil. 



Triptera. Quoy and Gaim. (Cuviera Rang.) — Shell 

 cylindrical, ending in an acute point ; rather angular near 

 the aperture; separated from the anterior cavity by an 

 entire transverse septum ; the tip often falls off. Animal 

 body elongate ; two large lateral wings, and between them 

 a lobe. — 3 species ; also fossil. 



Found on the coasts of Brazil, Australia, and India. 



Family 2. — CYMB ULIA CEA. 



Animal globular or ovate ; fins two, one on each side 

 of the mouth with a small intermediate lobe. Shell 

 cartilaginous, slipper shaped, occasionally wanting. 



* Sow, Conch. Manual. 



p 2 



