198 UPPER, OR FLINTY CHALK. 



Esq. of Lewes ; a gentleman, whose taste for science, leads him to 

 patronize every attempt to elucidate the natural history, and topography, 

 of his native town *. 



Tab. xxi. fig. 16. A cast of the adult shell, with its spinous projections ; 

 a small specimen of Choanites subrotundus is attached to the inner 

 volutions. It is scarcely necessary to observe, that the chalk ammonites, 

 and other multilocular testaceee, very rarely contain any remains of their 

 shelly covering. 



Tab. xxii. fig. 7. A cast of the young shell. 



LocaUty. Lower chalk, near Lewes. 



56. Ammonites navicularis. Tab. xxii. fig. 5. 



Elliptical ? umbilicate, volutions narrow, compressed, deeply inserted, 

 rapidly enlarging ; ambit convex, very broad, transversely costated ; costae 

 numerous, smooth, rounded. 



The specimen figured is the only known example of this species, and 

 this is unfortunately imperfect ; it is however remarkably characterized 

 by its navicular form, the width of the ambit, large rounded costs, and 

 sudden increase of the outer volution. The ribs are perfectly smooth, 

 and so numerous, as almost to expand into each other; with but few 

 exceptions, they extend entirely across the ambit, forming a tuberculated 

 margin on each side the wreaths. The form of the septa, aperture, and 

 umbilicus, is unknown. The drawing is diminished to one-half the size 

 of the original. 



Locality. Upper chalk, Ofi'ham. 



57. Ammonites catinus. Tab. xxii. fig. 10. 



* Since this was written, my lamented friend is no more ; but I feel a melancholy pleasm'e 

 in paying this humble tribute to his memory. For many years he had been ardently en- 

 gaged in forming a collection of drawings, and manuscripts, illustrative of the topography of 

 the south-eastern part of Sussex, with a view to publication ; but a long, and painful illness, 

 jirevented the accomplishment of his wishes. To the future historian of Sussex, his labours 

 cannot fail to afford material assistance ; and his name will be associated by posterity, with those 

 of Rowe, Burrell, Hay, Dallaway, and others, whose researches have lain the foundation of the 

 history, of this former kingdom of the South Saxons. It is to be hoped that his son, John 

 Webb Woollgar, Esq. M.A.S. whose scientific attainments are worthy of such a parent, will 

 be induced to favor the public with the result of his father's investigations. 



