1 2 The Natural History of Selborne 



O&rcea carinafra 



called by Lister, Rastellum ; by Rumphius, Ostreum plicatum 

 minus; by D'Argenville, Aurls Pom, s. Crista Galli ; and by 

 those who make collections, Cock's Comb. Though I applied to 

 several such in London, I never could meet with an entire specimen ; 

 nor could I ever find in books any engraving from a perfect one. 

 In the superb museum at Leicester House permission was given to 

 me to examine for this article ; and, though I was disappointed as 

 to the fossil, I was highly gratified with the sight of several of the 

 shells themselves in high preservation. This bivalve is only known 

 to inhabit the Indian ocean, where it fixes itself to a zoophyte, 

 known by the name Gorgon ia. The curious foldings of the suture 

 the one into the other, the alternate flutings or grooves, and the 

 curved form of my specimen being much easier expressed by the 

 pencil than by words, I have caused it to be drawn and engraved. 



Cornua Ammonis are very common about this village. As we 

 were cutting an inclining path 1 up the Hanger, the labourers found 

 them frequently on that steep, just under the soil, in the chalk, and 

 of a considerable size. In the lane above Well-head, in the way to 

 Emshot, they abound in the bank in a darkish sort of marl ; and 

 are usually very small and soft : but in Clay's Pond, a little further 



1 Doubtless the " Bostal," constructed in 1780. E. H. N. 



