204 CORALIDiE. 



species has been brought to light by Sir Edward Belcher. 

 The genus Emhla of Loven is possibly nearly allied. 



We see in Poromya characters which conduct us very 

 naturally from Corhula towards Thracia and its allies. 



P. GRANULATA, Nyst and Westendorp. 



Plate IX. figs. 4, 5, 6. 



Corbulaf granidata, Nyst and Westendorp (1839), Nouv. Recherch. Coq. 



foss. d'Anvers, p. 6, no. 10, pi. 3, f. 3. — Nyst, Descr. 



Coq. foss. des Terr. tert. de la Belgique, 1843, p. 71, pi. 



1, f. 6. — Jeffreys, Ann. Nat. Hist. vol. xix. p. 314, 



and vol. xx. p. 19. 

 Poromya anatinoides, Forbes, Brit. Associat. Report, 1843, p. 191. 



It is to the zeal and science of Mr. Jeffreys, through 

 whose distant and laborious dredgings, natural history has 

 been enriched with many rare and interesting discoveries, 

 whilst his careful guardianship of the collection of Turton 

 has thrown full light upon the many doubtful and spurious 

 species of that author, that the conchologist is indebted for 

 the discovery and publication of this most important generic 

 addition to our Fauna. 



The contour of the unique specimen from whence we 

 have derived our drawing and description, and which at 

 the first glance, might possibly be deemed a variety of 

 Kellia suborhicularis, to which it bears some very slight re- 

 semblance in general aspect, is somewhat rhombic, and the 

 length exceeds the breadth by about one- third. The tex- 

 ture is extremely thin and delicately fragile, yet is not so 

 transparent as from its slight fabric might be expected, 

 owing to the nature of its peculiar surface. This, which is 

 of a pale clay colour, and utterly devoid of lustre, appears, 

 when highly magnified, to be most minutely and crowdedly 



