CETACEA. 71 



Ziphius, Cuvier, Oss. Foss. v. 350; Gray, Zool. Erebus Sf Terror, 27. 

 Diodon, pars, Lesson, Tab. R. A.; Bell, Brit. Quad. 499. 

 Anodon, pars, Lesson, Tab. R. A. 

 Heterodon, sp., Lesson, Man. Mam. 

 Delphinorhynchus, sp., Gray, Ann. fy Mag. N. H. 1846. 

 Physeter, sp., Sow. Brit. Misc. 1. 



This genus is very like Delphinorhynchus, but is easily known 

 by the large size of the teeth in the middle of each side, and the 

 peculiar form of the lower jaw. Cuvier established the genus 

 on fragments of three fossil heads : 



1. Z. curvirostris, Cuv. Oss. Foss. v. 350. t. 27. f. 3. 



2. Z. latirostris, Cuv. Oss. Foss. v. 352. t. 27. f. 4-8. 



3. Z. longirostris, Cuv. Oss. Foss. v. 356. t. 27. f. 9, 10. 



Cuvier remarks, describing the first head, that " cette tete a, 

 comme on voit, de grands rapports avec le Cachalot, et encore de 

 plus grands avec 1'Hyperoodon. Elle ne differe de ce dernier 

 que parce que les maxillaires ne redressent point sur les cotes du 

 museau en cloisons verticales, et que 1'espece de mur de derriere 

 les narines ne se borne pas a s'elever verticalement, mais qu'il se 

 recourbe pour former un demi-dome au dessus de les cavites." 

 Oss. Foss. v. 352. 



Mr. Bell, following Lesson in adopting his heterogeneous genus 

 Diodon, has considered Sowerby's whale as a distinct genus from 

 Hyperoodon, but he observes, "whether the generic distinction of 

 the two be correct, appears very doubtful." Brit. Mam. 499. 



* Jaws elongate. 



1. ZlPHIUS SOWERBIENSIS. 



Black, grey beneath ; lower jaw moderately broad behind, and 

 gradually narrower and slightly bent down in front of the teeth. 



Physeter bidens, Sowerby, Brit. Misc. t. 1, and Icon. ined. in 



Mus. Brit. t. 



Diodon bidens, Bell, Brit. Quad. 497, fig- cop. Sowerby. 

 Delphinus Sowerbii, Jardine, Nat. Lib. t. 12, cop. Sowerby. 

 D. Sowerbiensis, Blainv. in Desm. Nouv. Diet. H.N.ix. 177 - 

 D. Sowerby i, Desm. Mam. 521. 



Delphinorhynchus bidens, Gray, Ann. fy Mag. N. H. 1846. 

 Heterodon Sowerby i, Lesson, Man. Mam. 419. 

 Ziphius Sowerbiensis, Gray, Zool. Erebus Terror, t. 572. 



f. 3, 4, from Blainv. drawing, p. 53. t. , from skull. 

 Inhab. North Sea. Elginshire, Brodie, 1800. 



The specimen yet observed was 16 feet long and 11 feet in cir- 

 cumference. 



