Dr. F. Baron Nopcsa on Kerunia. 101 



of defence, Sncli an occurrence would make it possible that 

 during life Ktrunia existed on a sea-bottom with its head 

 downwards. 



Before finishing this short note I would like to express my 

 hearty thanks to Mr. R. B. Newton for the great kindness 

 he has shown by giving me many valuable suggestions as 

 well as by undertaking the very tedious work of revising the 

 manuscript and proof-sheets of this paper. 



Literature. 



F. E. Edwards. " A Monograph of the Euceue Molhisca of Eugland. 



— Part I. Cephalopoda." Palseontographical Society, 1849. 

 H. J. Cartku. " Transformation of an Entire Shell into Chitinous 



Structure hy the Polyjje Hydractinia" Ann. & Mag. Nat. Hist. 



1873, ser. 4, vol. xi. p. 1, pi. i. 

 R. B. Newton and G. F. Harris. " A Revision of the British 



Eocene Cephalopoda." Proc. Mai. Soc. London, 1894, vol. i. 



p. 119, pi. X. 

 C. Mayer-Eymar. '' Un singulier Cephalopod de I'Eocene d'Egypte 



[Kerunia corniUa].^' Eclogas Geologicse Helvetise, 1990, vol. vi. 



no.2, p. 120. 

 . "Interessante neue GastropodenausdemUutertertiarEgyptens." 



Vierteljahr. nat. Ges. Ziirich, 1901, vol. xlvi. p. oO, pi. ii. 

 P. E. ViNASSA Di Uegny. " Studi suUe Idractinie fossili." Atti 



Real. Acead. Lincei (Roma), Mem. vol. iii. 1901, p. 107, pis. i.-iii. 

 P. Oppenheim. " Ueher Kerunia cornuta, Mayer-Eymar, aus deni 



Eocan Aegyptens." Centralblatt miu. geol. Palseont. 1902, p. 44 



(woodcut figures). 

 F. NopcsA. " Remarques sur Kenmia cornuta.^' Bull. Soc. geol. 



France, 1905 (in manuscript). 



EXPLANATION OF PLATE III. 



i')y. 1. Kenmia, basal view, showing ventral lip and large oral 



opening. 

 Fiij. 2. The same, posterior view, showing section of median part of 



chamber and fractured surface for main dorsal spine. 

 Fiff. 3. Another specimen, showing breast-like projection and constricted 



oral opening. 

 Fif/. 4. Another specimen, showing perfectly preserved oral opening 



with fractures of numerous symmetrically placed spines. 

 Fiij. 5. Distal end of a lateral spine exhibiting ramihcation. 

 i'Vy. 0. An irregular specimen, showing internal chamber and complex 



ramification of both lateral bi'anches, dorsal aspect. 

 Fly. 7. The same, giving basal view and showing flattened internal 



surface. 

 Fig. 8. Part of a dorsal spine of another specimen exhibiting ramification. 

 Fkj. 9. Dorsal aspect of small example, showing dorsal and lateral 



spines. 



