12 SUPPLEMENT TO GREAT OOLITE MOLLUSCA. 



CERITELLA LYCETTEA, Buv., sp., Lye. and Mor., sp. 



CERITELLA RISSOIUES, Mor. and Lye. Gr. Ool. Monog., i, tab. 9, p. 7, 1850, non 

 Pleurotoma rissoides, Buv. M^ra. Soc. Verd., t. ii, pi. 6, 

 fig. 9. 



ORTHOSTOMA LYCETTEA, Buv. Paleont. de la Mense Atlas, p. 32, 1852. 



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

 p. 587, figs. 78, 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 1'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 neio genus Tubifer, under the names of Tubifer plicatus and Tubifer Acteonifor- 

 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 Pleurotoma 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 MORRISEA, Buv., sp. PI. XLIV, fig. 22. 



CERITELLA LONGISCATA. Gr. Ool. Monog., i, tab. 9, fig. 14, p. 40, non Pleurotoma 



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

 OHTHOSTOMA MOREISEA, Buvig. 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 Pleurotoma longiscata ; 

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

 adopted. 



CERITELLA FUSIFORMIS, Lye. Tab. XLV, fig. 4. 



Testa parva elongata, fusiformi, lave ; anfractibus 5, lads, subplanis, anfractu 

 ultimo magno, subcylindrico, apertura elongata, angusta, antice et posticc valde contracto. 



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. 



