12 SUPPLEMENT TO GREAT OOLITE MOLLUSCA. 



Cerjtella Lycettea, Buv., sp., Lijc. and Mor., sp. 



Ceritella Rissoii>ES, Mor. and Lye. Gr. Ool. Monog., i, tab, 9, p. 7, 1850, non 

 Pleurotoma rissoides, Buv. Mem. Soc. Verd., t. ii, pi. G, 

 fig. 9. 



Orthostoma Lycettea, Buv. Paleont. de la Mense Atlas, p. 32, 1852. 



TuBiFEU PLiCATUS, Piette. Bull, de la Soc. Geol. de France, 2 se'r., t. xiii, pi. 13, 

 p. 587, figs. 7—8, 1857. 



I avail myself of the opportunity of giving another figure of this pretty species of 

 Ceritella, as the magnified figure in Plate IX does not sufficiently exhibit the neatness and 

 angularity of the volutions of the spire. M. E. Piette, in a memoir entitled " Descrip- 

 tion des Ceritheum enfouis dans les depots bathoniens de I'Aisne et des Ardennes," pub- 

 lished in the work above quoted, rejects the claim of Ceritella to be regarded as a new genus ; 

 but figures the present and also another Minchinhampton species of Ceritella as examples of 

 his proposed neivcjemis Tuhifer, under the names of Tubifer plicatus and Tubifer Acfeonifor- 

 mis. It is a satisfaction to discover this singular and unwitting testimony to the correctness of 

 our appreciation of this generic form. 



In the Atlas to the ' Palaeontology of the Mense,' page 32, M. Buvignier shows that we 

 were mistaken in supposing that our little Ceritella is the Fleurotoma rissoides of that author's 

 memoir above quoted, and which he subsequently assigned to his proposed new genus 

 Orthostoma ; in this instance, also, our genus Ceritella has the priority, 



Ceritella Moruisea, Buv., sp. PI. XLIV, fig. 23. 



Ceritella longiscata. Gr. Ool. Monog., i, tab. 9, fig. 14, p. 40, non Fleurotoma 



longiscata, Buvig., Mem. Soc. Phil. Verdun, pi. 6, fig. 8. 

 Oethostoma Mokeisea, Buviff, Paleont. de la Mense Atlas, p. 32. 



In this, as in the last species, the indifferent figures in the earlier memoir of M. 

 Buvignier led to the error of assigning our Great Oolite shell to his Fleurotoma lo7igiscata ; 

 the specific name proposed by that gentleman in his ' Palaeontology of the Meuae ' is here 

 adopted, 



Ceritella fusiformis, Lye. Tab. XLV, fig. 4. 



Testa pai'va elongata, fusiformi, lave ; anfractibus 5, latis, subplanis, anfractu 

 ultimo magno, subci/lindrico, apertura elongata, angusta, antice et postice valdc co7itracto. 



Shell small, elongated, fusiform, smooth ; spire moderately elevated ; volutions 5, wide 

 and nearly flat, the last volution large and cylindrical ; the aperture is elongated, narrow, 

 and much contracted at both its extremities, its length slightly exceeding that of the 

 spire. 



