164 R. Etheridge >, jun . — Notes on the Gilbertson Collection. 



Phillips's species is a somewhat elongated shell, and has heen fairly portrayed, so far 

 as the general characters go, by Prof, de Koninck. 1 



36. Nucula luciniformis, Phillips sp. (p. 210, t. 5, f. 11). 



The concentric striae are exceedingly fine in this species, the beaks quite close 

 together, and the escutcheon linear, and little developed. 



37. Nucula brevirostris, Phillips sp. (p. 210, t. 5, f. 11a). 

 Not in the Gilbertson Collection. 



38. Lucina? laminata, Phillips sp. (p. 209, t. 5, f. 12). 



This is an Edmondia-like shell with close concentric imbricating laminae. I cannot 

 conceive what has led Prof, de Koninck 2 to unite this species with Modiola 

 squamifera, Phillips, for there coidd not be two more dissimilar shells, more especially 

 as he had previously placed 3 L. ? laminata in the genus Cardinia. 



39. Isocardia ? axiniformis, Phillips sp. (p. 209, t. 5, f. 13). 

 Not in the Gilbertson Collection. 



40. Nucula cuneata, Phillips sp. (p. 210, t. 5, f. 14). 



The figure of this species is much enlarged. It has no appearance of a Nucula, 

 but I suspect it is very much more nearly allied to Pleurophorus, King. The posterior 

 radiating striae are quite apparent. 



41. Nucula tumida, Phillips sp. (p. 210, t. 5, f. 15). 



As pointed out by Prof. M'Coy, 4 this is the N. gibbosa, Fleming, under which 

 name the shell is now universally known. 



42. Nucula undidata, Phillips sp. (p. 210, t. 5, f. 16). 



The posterior end of this shell is produced, and when perfect is obtusely pointed. 

 In the figure it is too rounded and should have been represented as broken off. It 

 belongs to the same group of Palaeozoic Nuculidae as JV. Imvirostrum, Portlock. 



43. Nucula claviformis. Phillips, non Sow. (p. 210, t. 5, f. 17). 

 Identical with Leda or Nuculana attenuate/,, Fleming. The specimens with which 



Phillips worked were contained in the Collection of the Yorkshire Philosophical 

 Society, the Gilbertson Collection, and that of the Natural History Society of 

 Newcastle. Phillips usually appears to have first indicated after the name of each 

 species that collection in which his type was placed, and following that rule, the type 

 of this species would be in the Cabinet of the Yorkshire Society, but the Gilbertson 

 Collection contains one so like the figure that I cannot but regard it as the original 

 of his N. claviformis. 



44. Isocardia ? unioniformis, Phillips sp. (p. 209, t. 5, f. 18). 



The original specimen is in a very bad state of preservation. The species is the 

 type of Prof, de Koninck's genus JEdmondia. 5 



45. Cucidlaia obtusa. Phillips sp. (p. 210, t. 5, f. 19). 



Although marked in the usual way by Phillips as being in the Gilbertson 

 Collection, I am unable to find the type. 



46. Cucullaia arguta, Phillips sp. (p. 210, t. 5, f. 20). 



Phillips remarks that his shell is restored at the ends, and there is in the collection 

 such a specimen wanting a portion of the posterior end, otherwise it is in a very good 

 state of preservation, and is clearly the specimen from which Phillips's figure was 

 drawn. By tbe latter the species was referred to Cucullcea, and by Prof, de Koninck 

 to Area* but whatever may be the character of the shell to which Prof, de Koninck 

 has applied this name, that figured in the " Geology of Yorkshire" belongs to 

 neither of these genera, but possesses the prominent concentric ridges, split on the 

 anterior end, the anterior sinus, and well-developed posterior slope of that group of 

 shells to which Prof. M'Coy, in 1852, applied his previously enunciated name of 

 Leptodomus. Accepting the specimen in question in the Gilbertson Collection as the 

 type, I feel sure that it is to this group it will have to be referred, and neither to 

 Cucullcea nor Area. 



1 Descrip. Anim. Foss. Tert. Carb. Belgique, Atlas, t. 1, f. 15, a. c. 



2 Loc. cit. p. 92. 3 Ibic/> p_ 78. 4 Brit. Pal. Foss. p. 512. 



5 Descrip. Anim. Foss. Terr. Carb. Belgique, p. 66. 6 Loc. cit. p. 116. 



