56 MIDDLE ALBIAN STRATIGRAPHY 



whorl but the inner whorls are those of H. (H.) bullatus Spath. Bed 4 can definitely 

 be classified with the lyelli Subzone even if no specimens of Lyelliceras, Beudanticeras 

 or Protanisoceras have been preserved. A more typical lyelli Subzone fauna was 

 recovered from the lower part of Bed 5. The ammonites described by Newton are 

 preserved in two distinct lithologies, although they all possess remains of the nacreous 

 shell and, except for one, are preserved as partly crushed clay steinkerns. They were 

 re-identified by Spath as follows, to which my own comments are added. 



Hopiites interruptus Bruguiere 



(1) Hopiites pseudodeluci Spath (BMNH., C 6864) figured by Spath (1925a ; 121, 

 pi. X, fig. 6) which is preserved in an identical manner to those of Bed 4 from which it 

 probably came. 



(2) Hopiites sp. transitional between benettianus & paronai (BMNH., C 6863) 

 according to Spath (1925a ; 115, 118). This specimen which has pyritic inner whorls 

 is crushed ventrally, having come to rest on the sea floor on its venter. It is pre- 

 served in fawn clay with glauconitic loam filled burrows. It is specifically indeter- 

 minate. 



(3) Hopiites sp. benettianus, baylei group (BMNH., C 6862) (1925a ; 118) probably 

 does not belong to either of these two species. 



(4) Newton's figured specimen (BMNH., C 6861), identified by Spath as Hopiites 

 dentatus (J. Sowerby) (1925a ; 118), is preserved crushed in glauconitic sandy dark 

 grey clay. 



Hopiites splendens J. Sowerby 



(5) The two small specimens (BMNH., C 6866-7) were identified by Spath as 

 Beudanticeras probably laevigatum. They are preserved in exactly the same type of 

 matrix as (2) above. 



(6) The larger specimen (BMNH., C 6865) was identified by Spath (1926a ; 147) 

 as Anahoplites resembling A . mimeticus. It certainly is an Anahoplites, preserved in 

 the same type of matrix as (4) above, and its occurrence is discussed below. 



Hamites sp. 



(7) In his description of Hamites attenuatus Spath (1941 ; 611 footnote) referred to 

 the two specimens indicating that they might have been tuberculate and, therefore, 

 generically distinct. A close examination shows that they are both Protanisoceras 

 sensu-stricto, one of them (BMNH., C 6868) being P. (P.) barrense, the other (BMNH., 

 C 6869) closely comparable to that species. They are both preserved in the same 

 lithology as (2). 



The specimens (Nos. 2, 5, & 7 above) preserved in fawn clay with darker glauconitic 

 burrows are certainly a lyelli Subzone assemblage. The two specimens (Nos. 4 & 6) 

 preserved in glauconitic sandy dark grey clay suggest, however, a high spathi Subzone 

 age. It has been suggested above (p. 47) that the type of Anahoplites mimeticus is a 

 spathi Subzone species of Hopiites (H.) and certainly did not come from the Carstone, 

 of the Isle of Wight. The association of Anahoplites of the osmingtonensis-grimsdalei 

 group with species of Hopiites (H.) in the Osmington area of Dorset which Spath 





