PLATE LI. 



Inoceramus (continued.) 

 Figs. 

 1 — 4<. I. inco7ista7is, Woods. Upper Chalk. (P. 2S5.) 



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



Museum, No. L20955. The original of /. Lamarchi, Soweiliy, in Dixon, 

 ' Geol. Sussex,' pi. xxviii, fig. 29. Eight valve. 



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



valve ; h, anterior view of the same. 



3. Zone of Actiiiocamax qua'hatiis, East Harnham, Salisbury. Dr. Blackmore's 



CoUectiou. a, right valve; h, left valve ; c, posterior view of both valves. 



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



5. 1. inconstans var. siriiilus, Mant. Zoue of Micraster cor-anguinum, 

 Southeram. British Museum, No. 4768. The Type of I. striatus, 

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



