BLUE CHALK MARL. 93 



lustre, equal in beauty to the ammonites, and others show the foliaceous 

 sutures of the dissepiments ; in this state they are the Baculites of some 

 authors. The hooked part of the shell is very rare, but I have had the 

 good fortune to discover a few specimens, that exhibit the form of the 

 original in a more perfect manner, than in any examples previously noticed. 



21. Hamites affewwa^M*. Tab. xix. figs. 29, SO. 



Cylindrical, suddenly attenuated immediately beyond the curve; 

 annular undulations numerous, obtuse. 



" The larger hmb is suddenly contracted near the curvature ; 

 and the lesser one is consequently very slender in proportion." The 

 undulations are obscure at the back*. Mr. Sowerby, in the specific 

 description, states that it is slightly compressed ; but this circumstance is 

 evidently the result of accident, the true form of the original being per- 

 fectly cylindrical. This species occurs at Laughton, Ringmer, and Nor- 

 lington, and has also been discovered in Kent and Surrey. 



Figs. 29 and SO are delineations of two remarkably interesting spe- 

 cimens, the smaller limbs in both instances being nearly perfect, and 

 exhibiting an excellent type of the structure of the shells of this curious 

 genus. They were found at the depth of thirty feet, in the well attached 

 to the cottage of Mr. Warren Lee, near Cooksbridge, and are partly im- 

 bedded in the blue marl. The lesser limbs are flattened by compression, 

 and the interstices between the annular costse are partially filled with the 

 surrounding matrix. The shelly covering is beautifully iridescent. 



22. Hamites maximus. Min. Conch, tab. Ixii. fig. 1. 



" Slightly depressed ? undulations even, rounded, disappearing at the 

 back, curvature gradual f." 



Fragments of this species have been found at Eingmer, Norlington, &c. 



23. Hamites intermedius. Tab. xxiii. fig. 12. {Min. Conch, tab. Ixii. 

 2, 3.) 



Slightly depressed, costated, costae annular, oblique, obtuse ; curvature 

 rounding. 



* Min. Conch, vol. i. p. 137. f I^(>'- vol. i. P- 138. 



