OF NORTHUMBERLAND AND DURHAM. 95 



The animal of this species has the same large anterior sipho- 

 nal tube as the last ; the foot, too, is long and strap-shaped, but 

 a little more robust than that of K. suborhicularis. 



M. Recluz has separated this species from Kellia, and has 

 formed of it, and some other small shells, the genus Peronia, 

 We have carefully read over M. Recluz's very elaborate descrip- 

 tion, with our British specimens before us, and cannot perceive 

 any difference between this and the last species that can be con- 

 sidered more than specific. The ligament, upon which M. 

 Recluz founds a part of his distinction, appears to us to occupy 

 the same situation in each, with the exception that it is longer 

 and more deeply seated in K. rubra than in K. suborhicularis. 

 The teeth, too, are pretty nearly alike in number and position, 

 though a little different in form. Taking, therefore, into consi- 

 deration the similarity of the animals, we see no good reason for 

 dividing them. The characters of the animal of Feronia given 

 by M. Recluz are indeed very different from ours, but he does 

 not appear to have met with it in a living state, and has conse- 

 quently taken them from the Peron of Adanson, which from its 

 external ligament and two posterior tubes, appear to be a dis- 

 tinct genus. 



107. TURTONIA, Hanley. 

 1. T. MINUTA, Fab. 



Venus minuta, Fab. Fau. Groenl. 412. 

 Mya purpurea, Mont. Test. Brit. Supp. 21. 

 On small sea-weeds, in pools within tide-marks, common. 

 The animal of this species differs very considerably from that 

 of Kellia. The mantle is widely open anteriorly, giving passage 

 to a strong foot, broad towards the body, and angulate at the 

 posterior base. There is only a single siphon, which is very 

 small and slender, and is placed at the posterior or elongated end 

 of the shell. 



108. MONTACUTA, Turton. 



1. M. BIDENTATA, Mont. 



Mya bidentata, Mont. Test. Brit. 44, t. 26, f. 5. 

 From the fishing boats, and in sand, not uncommon. 



