PLATE LI. 



Inoceramus (continued.) 

 Figs. 

 1 — 4. I. inconstans, Woods. Upper Chalk. (P. 285.) 



1. Sussex (probably from the zone of Terebratulina lata of Mailing). British 



Museum, No. L20955. The original of I. Lamarcki, Soweiby, in Dixon, 

 ' Greol. Sussex,' pi. xxviii, fig. 29, Right valve. 



2. Zone of Holaster planus, Swaffham, Norfolk. Norwich Museum, a, left 



valve ; b, anterior view of the same. 



3. Zone of Actinocamax quadratns, East Harnham, Salisbury. Dr. Blackmore's 



Collection, a, right valve; b, left valve ; c, posterior view of both valves. 



4. Same zone, etc. a, left valve ; b, dorsal view ; c, anterior view. 



5. 1. inconstans var. striatus, Mant. Zone of Micraster cor-anguinum, 

 Southerarn. British Museum, No. 47(38. The Type of I. striatus, 

 Mant. a, left valve ; b, dorsal view of the same. (P. 292.) 



