70 MOLLUSCA FROM THE GREAT OOLITE. 



tudinalibus decussantibus et varicibus irrcgularibus angulaiis, ornatis ; umbilico contracto, 

 basi lata, tenuissime cancellato. 



Shell conical, depressed; whorls (4) angulated, and encircled with closely-arranged 

 lines, longitudinally crossed by others, and equally densely arranged; varices elevated, 

 longitudinal, angulated in their middle part, and placed at irregular distances ; the um- 

 bilicus is contracted ; the base is wide, slightly convex, and has a finely-cancellated surface. 



Locality. It occurs in the planking of Minchinhampton Common, very rarely. 



Solarium disculum. Plate IX, figs. 25, 25#, b. 



S. Testa parvd, superne discoided, in/erne concavd, lateribus angustatis, plants ; spird 

 vix elatd ; anfractibus 3, marginibus angulatis et nodulosis, nodulis crebris, depressis > 

 umbilico magno, margine noduloso. 



Shell small, discoidal above, concave beneath, the sides narrow and flattened ; the spire, 

 scarcely elevated, consists of 3 whorls, their margins angulated and nodulated, the nodules 

 closely arranged and depressed ; the umbilicus is large and deep, its margin is nodulated ; 

 the flattened sides of the last whorl are finely striated transversely. 



The extreme flatness of the upper surface, the generally depressed form, and angular 

 outer margin, distinguish it from contemporaneous species. 



Locality. It is rare, and occurs in the planking at Minchinhampton, and in the white 

 stone of Bussage and Eastcombs. 



Delphinula, Lam. 



Shell turbinated, thick, rugose ; whorls few, convex or angular ; aperture orbicular, 

 entire ; peritreme continuous, thickened ; umbilicus conspicuous and denticulated. 



Delphinula coronata, Sow. sp. Plate IX, fig. 26. 



Euomphalus coronatus, Sow. 1824. Min. Con., t. 450, fig. 3. 



_ _ Brown. Must. Foss. Conch., p. 82, t. 43, figs. 20—22. 



Delphinula coronata, Flem. 1827. Brit. Anim., p. 312. 



— — Bronn. 1848. Index Palaeont., p. 406. 



? Delphinula stellata, Buvignier. Mem. Soc. Philom. Verdun, 2. pi. 5. figs. 35, 36. 

 Solarium coronatum, D'Orb. Prod. Paleont., p. 300. 



D. Testa discoided, parvd, superne plana, angulatd et spinigerd ; spinis latis, acutis et 

 prominentibus ; basi concavd. 



Shell discoidal above, flattened, angular, and spined ; spines broad, pointed, placed at 

 the angle of the last volution ; base concave. 



