NEWTON AND HARRIS: BRITISH EOCENE CEPHALOPODA. 121 



plate has radiating sulci starting from the apex, posterior margin well 

 denticulated. Common. 



Our figures of this species give different views of the largest 

 and most perfect specimen yet recorded from Eracklesham. The 

 dorsal aspect exhibits an almost perfect sheath, with its upper convex 

 surface highly ornamented with prominent granulations arranged in 

 semi-circular rows. The lower surface shows a well-developed ventral 

 plate with its strongly radiate structure and serrated outline. The 

 vertical sides of the specimen, together with the fragmentary rostrum, 

 are well seen in the profile. 



Entire length of specimen .... 69 mm. (nearly 2f in.). 



Maximum width of sheath . . . . 31 ,, 



,, ,, across ventral plate 33 ,, 



Depth from top of sheath to base of 



ventral plate 22 ,, 



Formations and Localities. — Barton Eeds : High Cliff. Bracklesham 

 Beds : Bracklesham Bay, Bramshaw, Hunting-bridge, Brook, and 

 Stubbington. London Clay : Shejipey and near Whetstone. 



Belosepia Oweni, J. de C. Sowerby. 



Beloptere de Cuvier^'SiQ.mv. — Mem. Belemnites, 1827, p. 110, pi. i. 



Beloptera scpioidea \ fig. 2, non Blainv. 1825. 



Sepia Cuvieri, Desh. — Coq. Poss. Paris, 1835, vol. ii. p. 758, pi. ci. 



figs. 7-9, nojt Orbigny, 1826. 

 Belosepiia Cuvieri, Edwards. — Mon. Pal. Soc. 1849, p. 31, pi. i. 



figs. Za-Zd. 

 Belosepia Oweni | J. de C. Sby. — Dixon's " Sussex," 1850, pp. 109, 



,, hrevispina j 193, pi. ix. figs. 13rt, 13J, 14. 



Belosepia Oweni, R. B. Newton. — Syst. List Edwards Coll. British 



Museum, 1891, p. 288. 

 Belosepia Cuvieri, Cossmann. — Ann. Soc. B. Mai. Belgique, 1892, 



vol. xxvi. p. 11. 

 Rostrum shorter, thicker, and broader than in B. sepioidea, and more 

 inclined towards the dorsal surface, whilst the ventral plate is less 

 elliptical and the denticulations not so prominent. Callus nearly 

 perpendicular to axis of rostrum. M. Cossmann alludes to this species 

 as B. Cuvieri, Blainv., but on reference to Blainville's work we find 

 that he merely designated it " Le Beloptere de Cuvier, B. sepioidea,'''' 

 and that, therefore, the name B. Cuvieri was never proposed by him. 

 M. Deshayes seems to have fallen into the same error, for he called 

 it Sepia Cuvieri, a name, however, which cannot stand, because it had 

 ali'eady been proposed by D'Orbigny for a different mollusc, though in 

 this instance also the name cannot be accepted since it is a synonym for 

 B. sepioidea, Blainv. Sowerby' s name must therefore be adopted for 

 this species, as has already been pointed out by one of us.^ B. hrevispina, 



See R. B. Newton quoted in the synonjTny. 



