CETAOEA. 69 



Red Crag Nodule-bed of Suffolk are placed in this species by 

 Mr. Lydekker (Quart. Journ. Geol. Soc., Vol. XLIII., D. 14 



1887). 



HOPLOCETUS CURVIDENS? GERVAIS. 



A large tooth from the Marine Pliocene of Montpellier was 

 named as above by Prof. Gervais. (Zool. Pal. Fr. edit. I, p. 161 

 pi. 3, f. 12, 1848-52, and Osteogr. Cetaces, p. 340, PI. xx., f. 25^ 

 1880). Mr. Lydekker doubtfully refers to the same species some 

 teeth from the Red Crag Nodule-bed of Suffolk (Quart Journ 

 Geol. Soc., Vol. XLVI1L, p. 14, 1887). 



Genus HYPEROODON, Lacepede. 

 PLITE VIII., FIG. 4. 



The occurrence of this genus in the Suffolk lied Crag is thus 

 noticed by Mr. Lydekker (Quart. Journ. Geol. Soc., Vol. XLIII. 

 p. 14, pi. ii, fig. 6, 1887) : " Hyperoodon is represented by a very 

 perfect right periotic from the Red Crag in the Ipswich 

 Museum. This specimen, which has the accessory ossicle still 

 attached, cannot be distinguished from the corresponding bone 

 of the existing H. rostratus, and evidently indicates the exist- 

 ence either of that or of a closely allied form in the Pliocene ; 

 the occurrence of cervical vertebrae of a member of this genus 

 in the Antwerp Crag has been recorded by Prof. Van Beneden" 

 (Bull. Ac. Roy. Belg., Ser. 2, Vol. X., p. 407, 1860). 



Genus .CHONEZIPHIUS. Duvernoy. 



This genus, which differs from Mesoplodon in the non-ossifi 

 cation of the supra vomerine (or raesethmoid) cartilage, is repre- 

 sented in the Suffolk Crag by rostra referable to three species, 

 namely, Choneziphius planirostris, C. planus 9 and C. Packardi. 

 A periotic bone in the Museum of Practical Geology is referred 

 by Mr. Lydekker (Quart. Journ. Gepl. Soc., Vol. XLIII., p. 14, 

 1887) to this genus and provisionally to the first of these three 

 species. 



CHONEZIPHIUS PLANIEOSTKIS, CUVIER. 

 PLATE VIII., FIG. 6. 



Ziphius planirostris was the name given by Cuvier (Ossem. Foss., 

 Vol. V., Part 1, p. 352, 1823) to a rostrum from the Antwerp 

 Crag; which was afterwards called Choneziphius by Duvernoy 



