GET ACE A. 75 



much rolled portion of a longer specimen, but the manner in 

 which the lateral channels curve upwards towards the front, is 

 quite unlike any of the known Crag forms, and seems to show that 

 the specimen could not have been much longer when perfect. 

 The rnesethmoid is completely ossified and occupies a considerable 

 portion of the upper surface, apparently extending to the anterior 

 extremity, but in the front half of the specimen the sutures arc 

 completely obliterated. 



8 Q UAL OD ONTID^E. 



Genus SdUALODON, Grateloup. 



SQUALODON ANTWERPIENSIS, v. BENEDEN. 



PLATE VIII., FTGS. 15, 16, b. 



The name of Squalodon antwerpiensis was given by Prof. Van 

 Beneden (Mem. Ac. R. Belg., Vol., XXXV. Part iii, 1865, and 

 Vol. XXX VIL, Part v, 1869) to the remains of a remarkable 

 cetacean from the Antwerp Crag, and Prof Lankester (Quart. 

 Journ. Geol. Soc., Vol. XXI., p. 231, 1865) with some hesitation 

 referred to the same genus, certain teeth from the Nodule-bed of 

 the Red Crag of Suffolk which were elongated and possessed 

 nipple-like enamel crowns ; these, however, have not the flattened 

 form which characterises even the anterior teeth of Squalodon, and 

 they are now referred with more probability of correctness to the 

 genus Hoplocetus (Lydekker, Quart. Journ. Geol. Soc., Vol. XLIII 

 p. 15, 1887). 



Prof. Lankester (Geol. Mag., Vol. V., p. 258, 1868) also called 

 attention to another remarkable tooth in these words: "I have 

 to record a new cetacean from the Suffolk Bone-bed, indicated 

 by a flattened foliaceous tooth with a denticulate margin, 

 probably belonging to the genus Squalodon" Several teeth of 

 this form have since been obtained from the Suffolk Nodule-bed, 

 good examples of which are preserved in the Museums of York 

 and Ipswich, and there is now no question as to their belonging to 

 the genus Squalodon, and in all probability to the S. antwerpiensis, 

 Van Beneden. 



The tooth from the Red Crag near Woodbridge which Prof. 

 Lankester (Annals, Ser. 3, Vol. XIV., p. 35. 1864), thought might 

 belong to Ursus arvernensis, has very coarse enamel, unlike that 

 of any bear, and agreeing much more with some of the anterior 

 teeth of Squalodon; provisionally, therefore, it is included in the 

 present species (PL viii., fig. 16). 



This genus has been fully illustrated by Profs. V. Beneden and 

 Gervais (Osteog. Cetaces, p, 438, Plate xxvii., 1880). 



