252 SCALPELLUM. 



SCABROUS. Rough. 



SCALA. Klein. Scalaria, Auct. 



SCALARIA. Auct. Fam. Scalariana, Lam. Cricostomata, Bl. — 

 Bescr. Turrited, oval or oblong ; spire long, composed of rounded, 

 sometimes separate whorls, surrounded by regular concentric 

 ribs ; aperture oval, peristome reflected continuous, entire. — Obs. 

 The typical species of this genus, commonly called the Wentletrap, 

 (S. pretiosa) is celebrated for the beautiful appearance caused by 

 the numerous ribs encircling the whorls, and formerly produced 

 an immense price in the market. It is brought from China. 

 There are many smaller species, some of which are equally elegant. 

 Fig. 351, S. Pallasii, Kiener. 



SCALARIANA. Lam. A family belonging to the first section of 

 the order Trachelipoda, Lam. The shells belonging to it are 

 described as having the inner and outer lips continuous, without 

 a canal, emargination, or other division. In this respect the 

 family is stated to differ from the Turbinacea, and is therefore 

 separated. The genera may be distinguished as follows: — 



1. Vermetus. Irregularly twisted, like Serpula. Fig. 345. 



2. Eulima. Pyramidal ; apex contorted ; including Bonellia. 



Fig. 347, 348. 



3. Rissoa. Pyramidal, straight, consisting of few whorls. 



Fig. 346. 



4. Scalaria. With external varices. Fig. 351. 



5. Cirrus. Trochiforai. Fig. 349. 



6. Enomphalus. Orbicular. Fig. 350. 



7. Delphinula. Few whorls, rapidly increasing. Fig. 352. 

 SCALLOP. The common name for shells of the genus Pecten, the 



larger species of which were worn by pilgrims to the Holy Land 

 in the time of the Crusades. 

 SCALPELLUM. Leach. (A little knife or lancet.) Order, Pedun- 

 culated Cirripedes, Lam. — Descr. Flat, quadrated, acuminated, 

 composed of thirteen valves, one dorsal, arcuated ; one pair 

 apicial, acuminated ; one pair ventral ; two pair lateral, small, 

 sub-quadrate ; pedicle scaly.™ Obs. This genus and Smilium, 

 are the only Pedunculated Cirripedes which have thirteen valves ; 



