GASTEROPODA PECTINIBR AXCHIATA. 
55 
Solarium, Lam. 
Is distinguislied from all other Trochi by a very broad conical 
spire, at the base of which is an extremely wide umbilicus in which 
may be seen the internal edges of all the whorls, marked by a cre- 
nated cord'* * * § . 
Eyomphalus, Sowerhy. 
Fossil shells resembling a Solarium, but wanting the dentations on 
the internal whorls of the umbilicusf. The genus 
Turbo, Lin.% 
Comprehends all the species with a completely and regularly turbi- 
nated shell, and a perfectly round aperture. Close observation has 
caused tliem 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. The animal 
has two long tentacula, and the eyes placed on iiedicles at their ex- 
ternal base ; the 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 opercida observed in cabinets, wliich were 
formerly employed in medicine under the name of Unguis odoratiis. 
Some of them, — Meleager, Montf.§ are umbilicated, and others, 
— Turbo, Month, || 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 whorl, and the 
margin not tumid ; the animal similar to that of a Turbo. 
* Tr. perspeclivus, L., Chemn., V. clxxii, 1691 — 96; — Tr. stramineus, Ib. 1699; 
— Tr. variegatus, Ib., 1708 — 1709; — Tr. infundibv.liformis, Ib., 1706 — 1707. 
'I' Evomphalus pentangululus, Sowevb., Min. Conch., I, pi. xlv. f. 2; — Er. nodosus, 
Id., xlvi, itc. 
X This great genus constitutes the family Cricostosia of Illainville. 
§ Turbo pica, L. List., 640, 30; — T. argi/rosfoimts, Chemn., V, clxxvii, 17.58 — 
61; — T. niurgarilaceus, lb., 1762; — T. rcrsicoJor, List., 576, 29 ; — T. mespilus, 
Chemn., V, clxxvi, 1742 — 43; — T. granidatus, Ib., 44 — 46; — T. hulu.<, Ib., 48, 
49; — T. diadema, Id., p. 145; — T. cinereus, Horn., XII, 25, 26; — T. tuniuaf.us, 
Chemn., X, p. 295 ; — T. undulatus, Ib., clxix, 1640 — 41. 
11 Turbo petholatus, List., 584, 39; — T. cochins, Ib., 40; — T. chrysostomus, 
Chemn., V, clxxviii, 1766; — T. rugosus. List., 647, 41 ; — T. marmurulits. Id., 587, 
46; — T. sarmaficus, Chemn., V, clxxix, 1777 — 18, 1781; — T. cornidus, Ib., 1 779 — 
80; — T. oleariits. Id., clxxviii, 1771, 72 ; — T. rudiatus. Id., clxxx, 1788 — 89; — T. 
imperialis, Ib., 1790; — T. coronafus, Ib., 1791 — 93; — T. canal iculut us. Id., clxxxi, 
1794; — T. setosus, Ib., 95 — 96; — T. spinosus, Ib., 1797; — T. sparrerius, Ib., 
1798; — T. Mollkianus, Ib., 99 — 1800; — T. Sjyenglerianus, Ih., 1801 — 2; — 7'. casfa- 
nea. Id., clxxxii, 1807, 1814 ; — T. crenidalus, Ib., 1811 — 12; — T. smaragdulus, Ib., 
815 — 16; — T. cidaris, Chemn., V, clxxxiv ; — T. heUcinus, Born., XII, 2.1 — 24. 
