158 MESSES. A. J. JUKES-BROWNE AND \V. HILL 1 [May 1 896, 



figured in PI. V. figs. 3 & 3 a. This has only about thirteen ribs to the 

 whorl, and only five umbilical tubercles ; the whorls are narrow and 

 less involute, all characters which bring it closer to the typical form, 

 but the narrow back and flattened sides keep it under the variety 

 compressus. 



A third variety comes still closer to the Jiippocastanum of Sharpe, 

 being more inflated and having more prominent lateral tubercles ; 

 the back, however, resembles the variety compressus in the close-set 

 rows of elongate and laterally-compressed tubercles, so that its 

 characters are distinctly intermediate between the two extreme 

 forms. This is figured in PL Y. figs. 2 & 2 a. 



VII. Lists of Cenomanian Fossils found in 

 Devon and in Normandy. 



1. Fossils from the Cenomanian of Devon. 



The following list represents the fauna of the beds that we have de- 

 scribed in Devon, so far as it has been worked out. We have grouped 

 them in three columns only, for the reasons stated on p. 142. The 

 bed A of this list includes fossils obtained by Mr. Meyer in his Beds 



10 and 11 from all localities except Beer Head, where we regard his 



11 as part of 12. Bed B is the same as his Bed 12 plus the 11 of 

 Beer Head only, Mr. Meyer having informed us which of his fossils 

 came from the 11 of that locality. Bed C is Mr. Me er's 13. 



The fourth column shows how many of the fossils found in the 

 Cenomanian group of the coast occur also at the base of the Chalk 

 near Chard and Chardstock. This column is a nearly complete list 

 of the Chard fauna, for there are very few of the fossils found there 

 which do not also occur on the coast. 



The last column indicates the species occurring in beds A, B, and 

 C which are also found in the true Ceuomanian of the North-west of 

 France — i. e., of the departments of the Seine Inferieure, Calvados, 

 Orne, and Sarthe. 



The letters by which the fossils are indicated in the first three 

 eolumns have the following signification : — 



S means : collected by ourselves or by Mr. Rhodes for the Geo- 

 logical Survey. 

 H means : identified by Dr. Hinde from specimens sent to him by 



ourselves. 

 M means: identified by Mr. Me' er from specimens in his own 

 collection. 



