86 MOLLUSCA FROM THE GREAT OOLITE. 



Locality. This little conical shell ranks with the rarest productions of the Great 

 Oolite ; the white stone of Eastcombs and Bussage have furnished the only known English 

 specimens : Langrune, France. 



RIMULA, Defrance, 1827. 



RIMULARIA, Defrance. 1827. 

 SIPHO, Brown. 1847. 



Shell conical, base entirely open, oval ; apex curved more or less posteriorly ; surface 

 near the anterior border with a fissure, or oval foramen, usually placed upon a prominent 

 longitudinal rib ; the fissure does not reach the margin. 



RIMULA TRICARINATA, Sow., sp. Plate VIII, fig. 2, 2a c. 



EMARGINULA TEICABINATA, Sow. 1826. Min. Con., t. 519, fig. 2. 



Brown. 1847. Illust. Foss. Conch., p. 104, t. xlviii, 



figs. 14, 14*. 



Bronn. 1848. Index Palseont., p. 457. 

 D'Orb. 1850. Prod. Pal<ont., p. 303. 



R. Testa parvd, conicd; apice postice curvato, costis tribus magnis anticis, aliis minoribus 

 posticis, lineis interstitialibus, transversis numerosis. 



Shell small, conical ; apex curved posteriorly, with three large diverging, anterior ribs ; 

 other smaller ribs occupy the sides and posterior part of the shell ; the interstitial spaces 

 have numerous tranverse lines. 



In this species, as in the R. Elotii, the fissure is of a lengthened oval figure, and is cut 

 out of the middle and more elevated rib. Having examined the original specimen figured 

 in the Mineral Conchology, we are enabled to assign it to the present genus without 

 hesitation; in two of the specimens on the same tablet, an imperfection at the anterior 

 extremity of the mesial rib gave them somewhat the aspect of an Emarainula, and may have 

 been the reason, probably, for assigning both this and R. clathrata *wrk that genus. 



Locality. Ancliff: two specimens have, likewise, been found at Minchinhampton. 



RIMULA CLATHRATA, Sow., sp. Plate VIII, fig. 1, la c. 



EMARGINULA CLATHRATA, Sow. 1826. Min. Con., t. 519, fig. 1. 

 ? GOLDFUSSII, Roemer. 1836. Nordd. Oolith., t. 19, fig. 23. 



? Goldfuss. 1845. Petref., t. 167, fig. 15. 



SIPHO CLATHKATA, Brown. 1847. Illust. Foss. Conch., p. 103, t. 48, figs. 1, 2. 

 RIMULA Morris. 1843. Catalogue of British Fossils, p. 1 GO. 



Bronn. 1848. Index Palseont, p. 1088. 



D'Orb. 1849. Prod. Paleont., p. 303. 



