66 DR. L. E. SPATH ON THE AMMONITES [vol. lxxix, 



EXPLANATION OP PLATES III & IV. 



Plate III. 



Fig. 1. The upper 18 feet of Shales-with-Beef, on the west side of Charmouth 

 beach. They are paper-shales, with numerous seams of beef 

 (showing white in the photograph) and occasional lenticles of 

 limestone. The beds are thrown into gentle folds as they approach 

 the fault in the Char yalley, situated less than 100 yards east of 

 the photograph. 



The lowest bed seen is 74 i. The beef separating 74 j and 74 k 

 passes behind the child's head. Just above the child's head is the 

 beef between 74 k and 74 1, while that between 74 1 and 74 m lies 

 immediately above this. 74 m is a wide bed, and the beef 

 separating 74 m from 74 n is very conspicuous low down on the 

 right of the photograph. Near the middle of the cliff, and nearly 

 at the top of the clearly-exposed section, the irregular limestone 

 74 p and the lenticle-bed 74 r stand out clearly. The upper part 

 of the cliff is largely grassed-over, but a piece of the Birchi- 

 tabular (76) is visible to the right of the middle line of the 

 photograph and nearly at the cliff-top. 

 2. A nearer view of some of the same beds, from a little to the east of 

 those shown in fig. 1. The bottom of the section is in 74 n. The 

 hammer lies across an impersistent beef-seam in the middle of 74 o. 

 A little way above the hammer is the nodule-bed (74 p), shown 

 clearly only in the middle of the photograph. The lenticle-bed 

 (74 r) stands out very clearly above 74 p. 



Plate IV. 



Pig. 1. Paper-shales in the Shales-with-Beef, from 20 to nearly 30 feet 

 below the J3irc7w-nodular. The conspicuous bed near the top of 

 the photograph is the Black Amioceras Limestone (Hartmanni 

 Bed), 74 f . Immediately to the left of the middle of the photograph 

 is a hole whence shales have been dug. On a level with the top 

 of the hole is the Brooki Bed (74 d), one lenticle of which may be 

 seen in place towards the right of the photograph, and the hole 

 resulting from pulling out another lenticle lies at the same level to 

 the right of the big hole. The thick beef- seam at the base of the 

 section lies but a foot or so above Little Ledge (74 a). 

 2. A section in the Shales-with-Beef, from about 35 to 43 feet below the 

 J5irc7n-nodular. The indurated marl at the base is 72 a, Beef 19. 

 The beef-seam (bed 72 f) passes behind the child's neck. The 

 strong beef-seam above this is 73 a, the lower limit of Reef 20, 

 and the big lenticle in the middle of the photograph is in bed 73 f , 

 the upper limit of Beef 20. Between 73 a and 73 f can be seen, 

 below, the iron-sulphide band (73 c), and, above, the beef-seam (73 e). 

 The beds from 73 c to the top of the section are in the lower 

 Arietite horizon, and contain, too, Sulciferites. 



PAET II. PALEONTOLOGY : THE AMMONITES OE THE SHALES- 



with-'Beef.' (By L. F. S.) 



(A) Introduction. 



A list of the species of ammonites, identified by me, has already 

 been included in Dr. Lang's stratigraphical account. It is intended 

 here to review and amplify these identifications, and to attempt to 

 justify the generic classification which I have adopted, also to 



