GASTEROPODA. 



77 



part; outer lip simple. Animal, foot very large, thin; 

 head flattened; tentacula long, but having no eyes. — 26 

 species.* 



The shells of this genus are generally yellowish or pale 

 brown in colour ; they are brought from various parts of 

 the world, the animals preferring sandy coasts. Separated 

 from the £>;encra Buccinum and Terebra. 



Terebra. Adanson. (Subula Schum. ; Acus Humph.) 

 — Shell long, turreted, and slender, spire 

 pointed, whorls very numerous, often strongly 

 marked at the upper part, resembling a double 

 suture ; mouth oval, and strongly notched ; 

 operculum horny. Animal, the head snout- 

 shaped, and having two tentacula with eyes at 

 the outer base ; foot oval, short, thick, and 

 muscular. — 109 species (Sow.); also fossil. 



These shells are often called Needle-shells, 

 on account of their sharp, lengthened, and spiral Tcrchra macu . 

 form; some of them exceed ten inches in 

 length, and are often elegantly marked. The notched 

 mouth distinguishes them from the Turritella, which they 

 much resemble in shape. Very few of the species are 

 European, the greater number inhabiting the warmer 

 latitudes of the East and West Indies and Africa. They 

 occasionally creep out of the water, still keeping, how- 

 ever, within reach of the spray. T. maculata, from Cey- 

 lon, is a fine shell. T. pretiosa is exquisitely beautiful, 

 many inches in length, and the whorls elegantly marked 

 with curved dark brown lines. 



Cancellaria. Lam. — Shell oval or turreted, spire 

 slightly elevated, and pointed ; mouth oval, having either 



* Reeve's Iconiea. 



