IXOCERAMUS. 291 



T///ics.~ 'V\\o specinieii Hgured by Aiaulull as /. JlniiKjuiarfi x-.w.. IVoin tlu' Upper 

 Clmlk (pnil)alily zone of Micrastrr cor-aiKjtiimim) of Soutliei'am (l^cwes), and tlie 

 one Hiiurcd as Liof'ninin^i sp. l)y tlu' same antlioi' from Lewes, and /. Lt iu(trrl-'i, 

 S()\vt>i-l)y (in Dixon), fVoni tlie Chalk, Snssex (prolmbly zone of Trirhrnlnliud. 

 lif'i of ]\[allino-"), ai'e in tlic British ]\fus(Mim. Xos. -5878, I7l>'>, li'Jolt-V) I'csncct ivclv. 



Fig. oO — /«o<cioi)i»s iiicoMs/oiis, sp, nov. var. Sriioiiian. Haldon. Uritish Museum, Xo. LlTySO. Left valve. 

 A large flat form resembliug /. cijdoides, Wegner. Compare with Fig. 4(i. x J. 



Distribution. — Zone of Ifiiln-sfc)- iihiiias of Twyford, Swaffliam (Xorfolk), anil 

 Strood. Zone (if Mirvustur cor-ti'ntiiiHintriinii. of C'lintliam, Guilford Colliery 

 (Coldivd near Dover), and AVlianam (^'orkshire). Zone of Micraster cor-an<jniiiiuii 

 of Soutlieram (Fiewes). Zone of Acfiiioc((m((,i: rjuadratits of East Harnliaiu 

 (Salisbury) and lirighton. Zone of Bcleinuitdla vincronata of Siiiile (Isle of 

 \Vight). Probaljly also in the zone of Terebnitalina lata. 



