GASTEROPODA PECTINIBRANCHIATA. SO 



Solarium, Lajn. 



Is distinguished from all other Trochi by a very broad conical 

 spire, at the base of wliich is an extremely wide umbilicus in which 

 may be seen the internal edges of all the whorls, marked by a cre- 

 nated cord*. 



Evomphalus, So^verby. 



Fossil shells resembling a Solarium, but wanting the dentations on 

 the internal whorls of the umbilicusf . The genus 



Ttrbo, Liu.X 



Comprehends all the species with a completely and regularly turbi- 

 nated shell, and a perfectly round aperture. Close observation has 

 caused them to be greatly subdivided. In the 



Turbo, Lam. Properly so called. 



Have the shell round or oval, and thick ; the aperture completed on 

 the side next to the spire, by the penultimate whorl. Tlie animal 

 lias two long teutacula, and the eyes placed on pedicles at their ex- 

 ternal base ; tlie sides of the foot are provided with membranous 

 wings, sometimes simple, at others fringed, and occasionally fur- 

 nished with one or two filaments. It is to some of these that belong 

 those petrous and thick opercula observed in cabinets, which were 

 formerly employed in medicine under the name of Unguis odoratus. 

 Some of them, — Meleager, Montf.§ are imibilicated, and others, 

 — Turbo, Montf.,|! are not. 



Delphinula, Lam. 



Have the shell thick, as in Turbo, but convoluted in nearly the same 

 plane ; the aperture completely formed by the last wliorl, and the 

 margin not tumid ; the animal similar to that of a Turbo. 



* Tr. pcrspeclkv.s, L., Chemn., V. clxxii, 1691 — 96; — Tr. stramineus, lb. 1699; 

 — Tr. mriegatus, lb., 1708 — 1709; — Tr. infundibuliformis, lb., 1706 — 1707. 



f Evomphalus pentanguJat us, Sowerb., Min. Conch., I, pi. xlv. f. 2; — Er. nodosus. 

 Id., xlvi, &c. 



X Tliis great genus constitutes the family Cricostoma of Blaiuville. 



§ Turbo pica, L. List., 640, 30; — T. argijrostomus, Chemn., V, clxxvii, 1758 — 

 61; — T. margaritaceus, Tb., 1762; — T. versicolor, List., 576, 29; — T. tiiPS>)ili(S, 

 Chemn., V, clxx\1, 1742 — 43; — T. gramilafus, lb., 44 — 46; — T. hidiia, lb., 48, 

 49; — T. diadema, Id., p. 145; — T. cinereus. Born., XII, 25, 26; — T. forquaius, 

 Chemn., X, p. 295; — T. undulafus, lb., cLxix, 1640 — 41. 



II Turbo petholafus, List., 584, 39; — T. cochlus, lb., 40; — T. chrt/soslomus, 

 Chemn., V, clxxviii, 1766; — T. rugosus, List., 647, 41 ; — T. marmoratus, Id., 587, 

 46; — T. sarmaficiis, Chemn., V, clxxix, 1777 — 18, 1781; — T. cormifus, lb., 1779 — 

 80;— T. olearius, Id., clxxviii, 1771, 72 ;— T. radiafus, Id., cLxxx, 1788— 89;— T. 

 imperialis, lb., 1790; — T. coronatus, lb., 1791 — 93; — T, canaliculatus. Id., clxxxi, 

 1794; — T. setosus, lb., 95 — 96; — T. spinosus, lb., 1797; — T. sparverius, lb., 

 1798; — T. Moltkiamts, lb., 99 — 1800; — T. Sp€nglenanHS,lh., 1801 — 2; — T. casfa- 

 nea. Id., clxxxii, 1807, 1814 ; — T. cremdatus, lb., 1811 — 12; — T. smaragdulvs, lb., 

 815 — 16; — T. cidaris, Chemn., V. clxxxiv ; — T. helicinus, Born., XII, 23 — 24. 



