GASTEROPODA. 69 
M. Testa turbinato-conicd, levi; spird elatd, obtusa; anfractibus planis seu subconvezis ; 
suluris vie impressis; anfrdctu ultimo permagno; aperturd ovatd; umbilico nullo.  Aitate 
adulta testa elatiore. 
Shell turbinated, conical, oblique, smooth; spire elevated, obtuse ; whorls flattened, or 
slightly convex, the sutures rather indistinct ; the last whorl very large; the aperture ovate, 
and the base without umbilicus or sulcus. 
The young shells are rather discoidal, but with mcrease of growth gradually become 
obliquely conical, so much so, that the two extremes of the figure would scarcely be taken 
for the same species. 
Locality. tis abundant in all the shelly beds of the Great Oolite formation near 
Minchinhampton. Eparcy, France. 
Sonartum, Zam. 1801. 
Omaxaxis. Brrrontra, Deshayes. 
Shell depressed, conical, or discoidal; base concave, or widely umbilicated, the spiral 
margin of which is angulated and crenulated ; aperture trapezoidal, with a thin peritreme. 
SoLaRium poLyconium, Archiac. Plate IX, figs. 24, 24a, 6. 
SoLartum poLyGonium, Archiac. 1843. Mém. Soc. Geol. de France, tom. v, p. 378, 
pl. 29, fig. 1. 
_ —_ Bronn. 1848. Index Palzont., p. 1152. 
— — D'Orb. 1850. Prod. Paléont., p. 300, 
S. Testé discoided, spird parvd, anfractibus (4) planis, ultimo carinato; angulis (9) 
costatis ; costis elatioribus ; lineis transversis et longitudinalibus decussatis ; carind parva, 
nodulosd prope suturam sita. 
Shell discoidal, spire small, whorls (4) flattened, the last whorl carmated and angulated ; 
angles (9) costated ; costa elevated; there are also encircling lines decussated by others 
which are longitudinal, and a small, closely nodulated carina, surrounding the upper portion 
of the whorls, near to the suture; the first two volutions are smooth, rounded, elevated, 
but minute. 
Locality. This species occurs in the vicinity of Minchinhampton more frequently than 
any other of the genus, but, owing to its thinness and delicacy, few examples are well 
preserved. The white stone of Bussage is the most favorable position for obtaiming it. 
Great Oolite, Eparcy, France (D’ Archiac). 
SoLarium vaRicosum. Plate IX, figs. 23, 23a, 6. 
S. Testd conico-depressd ; anfractibus (4) angulatis, lineis erebris transversis et longi- 
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