ELASMOBRANCHII. 105 



specimen from the true Coralline Crag of Orford, Suffolk ; but 

 the Nodule- bed below the Suffolk Red Crag has yielded by far the 

 greater number of the English specimens. Under its different 

 synonyms it has been recorded from the Pliocenes of Belgium by 

 Le Hon (Prelim. Me'm. Poiss. Tert. Belg., p. 7, 1881) from the same 

 horizon of several localities in Italy by Lawley, (loc. cit.) who also 

 identified the species in European Miocene strata; and its occurrence 

 in North America in the Miocene and Eocene has been recorded 

 by R. W. Gibbes (Fossil Squalidae of the United States, 1848). 

 The British Museum has specimens referred to this species from 

 Older Miocene (?), New Zealand, and from the newer Teritary of 

 Coquimbo, Chili. 



At the present day, according to Dr. A. Giinther (Cat. Fishes, 

 B. M., Vol. VIII., p.* 392), C. Rondeleti is found living from the 

 Mediterranean to Australia. 



Genus LAMNA, Cuvier. 

 (OTODUS, Agassiz et auctornm.) 



The recent revision of the Elasmobranchii by Mr. A. Smith 

 Woodward (Cat. Foss. Fishes, B. M., Part i, p. 349, 1889), however 

 necessary and desirable, is extremely perplexing and for some 

 time will lead to much confusion, for not only has it necessitated 

 the removal of nearly all the species hitherto known as Lamina to 

 the genus Odontaspis, but also the placing of all the species of 

 Otodus under the generic name of Lamna. 



Thus revised, the occurrence of Lamna (Otodus} has been 

 recorded by Prof. Prestwich (Quart. Journ. Geol. Soc./ Vol. 

 XXVIL, pp. 132, 349, 1871) from the Nodule-bed below the 

 Coralline Crag and from that below the Red Crag also. 



LAMNA (OTODUS) OBLIQUA, AGASSIZ. 



Specimens from the London Clay were named Otodus obliquus 

 by Agassiz (Poiss. Foss., Vol. III., p. 267) and similar specimens 

 have been found in the Nodule-bed below the Red Crag ; but as 

 it is probable that they have been 10 a large extent, if not wholly, 

 derived from beds older than the Red Crag, the species seems 

 never to have been included in any list of English Crag fossils. 



Examples of both large and small teeth agreeing with Agassiz' 

 figures (loc. cit., pi. 31 and pi. 36, figs. 22-27) have been found in 

 the Suffolk Red Crag, and some of each seem too perfect to have 

 been derived from Eocene strata, although there is no doubt as to 

 their belonging to this London Clay species. 



