164 MESSES. A. J. JUKES-BKOWNE AND W. HILL : [May 1896, 



Table (continued). 



Cephalopoda (cont.). 



Ammonites Mantelli, Sow 



,, navicularis, Sow. .. 



„ jpentagonus, sp. nov 



„ planulatus, Sow. .. 



„ obtectus, Sharpe 



„ Benevieri, Sharpe . . 



„ rotomagensis, Defr. 



„ varians, Sow 



„ „ var. 



„ Wiestii, Sharpe 

 Scajphites csqualis, Sow 



„ „ var. obliquus, Sow. 

 Turrilites Bechei, Sow , 



„ costatus, Lam , 



„ Gravesianus, d'Orb , 



„ Morrisii, Sharpe 



„ Scheuchzerianus, Bosc .... 



„ tuberculatus. Bosc 



Hamites simplex (?), d'Orb 



Brong 



disjpar, d'Orb.) 



Pisces. 



Lamna appendiculata (?), Ag. 



Ptychodus dectcrrens, Ag 



Scapanorhynchas 



Oxyrhina Mantelli, Ag 



Devon. 



SM 

 SM 



M 



SM 

 S 



M 

 M 

 M 



SM 



M 

 M 

 M 



M 



as "P 



Q 



M 



SM 

 S 

 M 



ivi 



SM 



SM 

 M 

 M 





From the above list it will be seen that the fauna of the Devon 

 zone of Ammonites Mantelli is the fauna of the Cenomanian of 

 the North-west of France. There are 10 species which are at 

 present only known from their occurrence in these beds or near 

 Chard. Deducting these from a total of 195 species and varieties 

 of invertebrata, we have 185 which occur elsewhere, and out of 

 these 132 are found to occur in the Cenomanian of Western France ; 

 while some others, such as Ecliinocyphus difficilis, Magas Geinitzi, 

 Ammonites planulatus, A. laticlavius, A. leptonema, and A. euom- 

 ,jphalus, etc., occur in beds of Cenomanian age elsewhere. 



Moreover there are 4 echinoderms, 18 lamellibranchs, and 6 or 

 more gasteropods which are not known to occur elsewhere in 

 England, but which are common to this Devon deposit and the 

 Cenomanian of Western France. Mr. Meyer's collection includes 

 many species of gasteropoda which he has not been able to name, 

 but we think it very probable that, if they could be compared with 



