BIVALVIA. 125 



Turton, in his 'British Bivalves,' p. 258, states the animal of this species to be 

 viviparous, and that he found many specimens filled with perfectly formed young ones, 

 similar in habit to the Genus Cydas. 



8. KELLIA RUBRA, Montague. Tab. XI, fig. 10. 



CARDIUM RUBRUM. Mont. Test. Brit., p. 83, t. 27, fig. 4, 1803. 

 Mat. and Rack. Linn. Trans., vol. viii, p. 66. 

 W. Wood. Ind. Test., p. 24, 1825. 

 TELLINA RUBRA. Turt. Conch. Diet., p. 168. 



KELLIA RUBRA. Turt. Brit. Biv., pp. 57 & 258, pi. 11, figs. 7, 8, 1822. 

 Flem. Brit. An., p. 430, 1828. 

 Gould. Inv. Massach., p. 60, 1841. 

 Thorpe. Brit. Mar. Conch., p. 51, 1844. 

 Alder. Cat. Moll. North, and Durh., p. 94, 1848. 

 Forb. and Hani. Hist. Brit. Moll., vol. ii, p. 94, pi. 36, figs. 57, and 



pi. O, fig. 3, 1849. 



LAS^A RUBRA. Brown. Illust. Conch. Gr. Brit., pi. 20, figs. 18, 19, 1827. 

 BORNIA SEMINULUM. Phil. En. Moll. Sic., vol. i, p. 14, pi. 1, fig. 16. 



Desk. Exped. Scient. Algerie. Moll., pi. 43, figs. 811, and pi. 43 A, 



figs. 6, 8. 

 PORONIA RUBRA. Reduz. Rev. Cuv. Zool., p. 175, 1843. 



Hanley in Brit. Mar. Conch. Syst. Ind., p. xxv, 1844. 



Spec. Char. Testa minutd, ovatd, tumidd, subin&quilaterdli lavigatd, utrinque rotundatd, 

 umbonibus prominuUs. 



Shell small, ovate, tumid, slightly inequilateral, smooth ; both sifles rounded, 

 umbones rather prominent. 



Diameter, T V tn f an> inch. 



Locality. Coralline Crag, Sutton. 



Recent, Mediteranean, Britain, North America. 



A single slightly injured specimen from the rich Depot of small shells in the 

 Coralline Crag at Sutton is all that I have been able to obtain ; it seems to have the 

 essential characters of the recent species, to which it is here referred, and as such 

 is introduced as an identity, although a few more and better specimens would be 

 desirable for confirmation : the character in which the preceding species seems most 

 to differ from the recent shell, and upon which its specific separation was founded, is 

 its being more inequilateral, and among all my numerous specimens there may be 

 observed a very general uniformity in that respect. The specimen now under notice has 

 the hinge more in the centre, placed as in the recent shell, the two lateral teeth forming 

 a very obtuse angle with the umbo ; they appear rather less in size than those of the 

 British specimens, and these are said to be less developed than in the Mediterranean shell. 

 This is said by Mr. Clark (Mag. Nat. Hist., 1849,) to be the most terrestial of 

 Bivalves, its habitat being generally in Lickina pygmaa, and that often from ten to 

 twenty feet above the level of the highest spring-tides. 



