440 Mr. T. Davidson on Lamarck's species of 



marek's collection at B. Delessert's, as well as in the museum of 

 the Garden of Plants, none of which however belong to Sow- 

 erby' s type, but are referable to several distinct forms from va- 

 rious deposits of different ages. Thus for example, those in the 

 Garden of Plants, as well as one in B. Delessert's cabinet, are 

 oolitic ; others belong to the Neocomian beds, such as those 

 shells figured and described by M. D'Orbigny in vol. iv. p. 75. 

 pi. 506. of the ' Pal. Franc/ under the name of Terebratula prce- 

 longa, Sowerby : but M. D'Orbigny is mistaken as to his iden- 

 tification of this shell with the ones described under that name 

 by Mr. Sowerby. Besides these, we find two specimens which are 

 probably Terebratula Sella, and as M. Deshayes justly observes in 

 his new edit, of Lamarck, a great number of smooth Terebratulas 

 with two plaits have been called Ter. biplicata, but which are 

 quite distinct from Sowerby's type, which belongs to the gault 

 of Folkestone and Cambridge. 



32. Terebratula bisinuata, Val. in Lamk. PI. XIII. fig. 32. 



T. testa subrotunda, subdepressa, antiquata, fragili, leevi, supeme bipli- 

 cata : nate producta non incurva. 



Obs. This species belongs to the tertiary beds of the Parisian 

 basin, well figured and described by M. Deshayes, Coq. Foss. 

 des Env. de Paris, torn. i. pi. 65. 1, 2. It has also received 

 several other names, such as Ter. gigantea, which, according to 

 Baron Leopold von Buch, would be the same as Lamarck's type : 

 several specimens are to be seen in B. Delessert's collection. 



33. Terebratula Kleinii, Val. in Lamk. PI. XIII. fig. 33. 



T. testa ovata, depressa, subantiquata, lsevi, superne biplicata creber- 

 rime et subtilissime punctata : nate incurva. 



Obs. Several persons, and among others M. Deshayes (new ed. 

 of Lamarck), refer to this species the Ter. globata of Sowerby. 

 M. Valenciennes, who was the original describer of the species, 

 convinced me of the mistake, which can be at once seen from 

 three type specimens in the collection of the Garden of Plants ; 

 one of which I have figured in my plate : it belongs to the oolitic 

 beds, probably from Normandy. Lamarck's reference to Ano- 

 mya Terebratula of Linnaeus may have led to this mistake. M. 

 D'Orbigny has also fallen into the common error in his f Pro- 

 drome ' by attributing Ter. globata to Lamarck's species. 



34. Terebratula Pedemontana, Val. in Lamk. PI. XIV. fig. 34. 



T. testa subrotunda, subdepressa, transversim striata, superne bian- 

 gulata : umbone elevato, nate recurva. Coll. Museum. 



Obs. M. Valenciennes in his description of this species states 

 that it approaches the preceding one above all by the rounded 



