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. Trochiform. 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_, Pedunculated 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; in the latter genus, which we think should at any rate be united to this, the valves are somewhat differently placed, and the pedicle is said to be smooth. Fig. 35, Scalpellum vulgare. British. SCAPHA. Klein. (_A boat._) NAVICELLA, Auct. SCAPHANDER. Montf. BULLA lignaria, Auct. Fig. 251. SCAPHELLA. Sw. A genus of the family "Volutinæ," Sw. thus described: "Shell smooth, almost polished; outer lip thickened internally; suture enamelled; lower plaits the smallest; apex of the spire various: 1. fusiformis. Sw. Bligh. Cat. 2. undulatus. _Ex._ Conch. pl. 27. 3. Junonia, _Ex._ Conch. pl. 33. 4. stromboides. 5. papillosa. Sw. Sow. gen." Sw. Malac. p. 318. SCAPHITES. (_A boat._) _Fam._ Ammonacea, Lam. and Bl.--_Descr._ Convolute, chambered, closely related to the Ammonites, from which it differs in the last whorl being eccentrically straightened, and lengthened, and again incurved towards the extremity. Only known in a fossil state. Fig. 481, S. æqualis. SCAPHULA. Sw. A genus of "OLIVINÆ," Sw. thus described: "Spire very short, thick, obtuse, and not defined; aperture very wide, with only two or three oblique plaits at the base. Sw. patula, _Sow._ Tank. Cat. 2331. (_b._)" (Sw. p. 322.)