The position of the Yorkshire Alum Shale in relation to the 

 Barrington Beds is uncertain ; but as the communis-\ike forms are more 

 or less associated in Yorkshire with hifrons and suhcarinatum, the position 

 may be about as here stated. On the other hand, the Alum Shale beds 

 may be spread over a wider series of the Barrington Beds. 



The following is an alphabetical list of the genera of Dactylioceratidae 

 mentioned in the foregoing pages, with references to their positions in 

 the Analysis. 



Table XII — Dactylioceratid^ (Generic list) 



Emileites nov.. Genotype, E. malenotatus, nov., T.A., PI. 

 DCCII. A race of small sphaeroceratoid cadicones differing from 

 Emileia in suture-line — Li barely comes to the guide-line, while L2 

 ends well away from it ; in primary ribs being curved, rather small, 

 ending in a small tubercle ; in secondary ribs being curved forward 

 slightly over a well-arched venter and as numerous — 4 primaries give 

 22 secondaries — as in large examples of Emileia, but more numerous 

 than in small cadicones of Emileia. The place of junction of primaries 

 and secondaries is in 82. 



The example figured as genotype is of considerable historical interest. 

 It is one of the two specimens relied on by H. B. Woodward (The Jurassic 



