SOLARIUM. 323 
256. SoLARIUM POLYGONOIDES, sp. nov. Plate XXVI, fig. 9. 
Description : 
Diameter : : 5 : . 4mm. 
Height : : : : . 3mm. 
Spiralangle . : : ; 2. W115". 
This rare form, although related to the species last described, differs from it 
in being somewhat less depressed ; the radial coste are wider apart, and more 
strongly developed towards the periphery, thus imparting a slightly polygonal 
outline, which is well seen in the body-whorl. The bicarination of the body- 
whorl is less pronounced, and the ring of tubercles at the margin of the umbilicus 
less distinct. [The conditions of ‘preservation leave some doubt upon this 
point. | 
Relations and Distribution—From specimens of S. polygonium, d’Arch., in the 
Great Oolite of Minchinhampton this form is distinguished by the greater number 
and lesser salience of the angles of the periphery, and by other points of 
ornamentation. As a matter of fact, S. polygonoides would seem to occupy an 
intermediate position between 8. pisoliticum and S. polygonium, and this accords 
with its stratigraphical position in the Clypeus-grit at Barrington. A single 
specimen. 
257. Sotartum piapema, Lycett, MS. Plate XXVI, fig. 10. 
Note.—No publication has given me so much trouble and cause for perplexity. 
as the paper by Lycett on the “Fossil Shells from the Inferior Oolite in 
Gloucestershire,” which appeared in the first volume of the ‘ Proceedings of the 
Cotteswold Naturalists’ Club’ in 1853, and previously in the ‘ Annals.’ In that 
paper (p. 80) Lycett describes ‘‘ Solarium” Cotswoldiex and no other species, 
although previously (p. 72) he had enumerated in addition three species of 
Solarium, one of which received the specific name ‘‘ diadema.” 
Of mere names in a table I should not feel bound to take notice unless there 
was corroborative evidence on the point. It so happens that in Mr. Brodie’s 
Collection there is a very pretty fragment marked ‘‘ Solariwm diadema,” presumably 
on Lycett’s authority. It is different from any other form, and seems worthy of 
distinction. 
Description : 
Diameter : : ; : - ¢ mm. 
Height : . F : 3) On. 
Spiralangle . : ! : 2) «LOO? 
