KELLIA. 87 



dropped altogether. That of KelUa was given by Turton, 

 m honor of his friend and instructor, Mr. CKelly of Dub- 

 hn, a gentleman who, we are happy to say, is still among 

 us, enjoying the pleasures of natural-history research in 

 his native land. There are about a dozen species of Kellia 

 known (including Poronife), scattered through the seas of 

 all parts of the globe. KellifB occur also as tertiary fossils, 

 and have been enumerated, but without sufficient grounds, 

 among the carboniferous limestone shells of Ireland. 



K. suBORBicuLARis, Moutagu. 



Pure white, more or less ventricose, two primary teeth in one of 

 the valves. 



Plate XVIII. figs. 9, and 9 a, 9 b., and (animal) Plate 0. fig. 4. 



Mya siihorhicularis, Mont. Test. Brit. p. 39, and 564. — Linn. Trans, vol. viii. 

 p. 41. — DiLLW. Recent Shells, vol. i. p. 55. 



Tellina suhorhieularis, TuRT. Conch. Diction, p. 1 79. 



Kellia siiborbicularis, Turt. Dithyra Brit. p. 56, pi. 11, f. 5, 6. — Flem. Brit. 

 Anim. p. 430. — Macgill. Moll. Aberd. p. 276. — Brit. 

 Marine Conch, p. 51. — Alder, Cat. Northumb. and Dur- 

 ham Moll. p. 93— Index Testaceolog. pi. 3, f. 37.— 

 Hanl. Recent Shells, vol. i. p. 43, pi. 3, f. 37. 



Bornia inftata, Philippi, Moll. Sicil. vol. i. p. 14, and vol. ii. p. 11. 



TeUimya suhorhieularis. Brown, Illust. Conch. G. B. p. 106, pi. 42, f. 14, 15. 



An examination of a large number of specimens, so 

 closely united by exact links, that their specific identity is 

 irrefragable, demonstrates, that without the distortion, b}^ 

 which in other lithodomous genera {Petricola, Venerupis^ 

 Saxicava, <Sfc.), the shape is so strangely transmuted, the 

 outline of this Kellia may vary from subrhombic, with 

 the distance from the anterior to the posterior extremity 

 greatly exceeding that from the beaks to the opposite mar- 

 gin, to triangularly orbicular, with the breadth surpassing 



