284 DELPHINID^. 



Society of London. The specimen figured in the ' Voyage of 



the Erebus and Terror/ fig. 9. p. 34. 

 The following are the measurements, first, of the specimen n. 1139 

 in the Museum of the Royal College of Surgeons, and, secondly, of 

 the skull in the British Museum : — j^ -^^ jjj_ ^ 



SkuU: Length, entire 37 36 6 



Length of nose 18 18 



Length of teeth-line 14 6 14 6 



Length of lower jaw 29 6 29 6 



Breadth at notch 12 6 12 



Breadth at orbit 21 21 



Breadth at temple above 20 20 



Breadth at middle of beak 10 10 



Breadth of intermaxillaries 3 9 3 6 



Breadth in front 4 6 4 6 



Breadth in middle 3 3 3 3 



Professor Owen observes, " The skull of the Cape Grampus (Del- 

 phinus Orcd) is of a somewhat small size, and differs from the pre- 

 ceding specimen (the Orca of the Thames) chiefly in the greater 

 development of the tuberosities and curved ridges on the sides of the 

 superoccipital, and in the less development of the median vertical 

 ridge. The contour of the occiput at this part is straight ; it pre- 

 sents a double sigmoid curve in the Great Grampus (D. Orca). The 

 slender nasal processes of the premaxUlaries form convex ridges on 

 this skull : they are more flattened in the Great Grampus. There 

 are two small additional teeth at the back of the series, which may 

 depend upon the present specimen having belonged to a younger 

 individual. The slight differences noticeable in the skull chiefly 

 depend on the muscular attachment, and are of a kind to characterize 

 varieties, not to establish specific distinctions." (I. c. 456. no. 21519.) 



The skuU in the Royal College of Surgeons appears to be the one 

 which Professor Owen gives the measurement of as J). Orca, in his 

 account of Phoccma crassidens in the ' British Possil Mammalia.' 



The Grampus of the South Sea whalers is very frequently noticed 

 in the Pacific Ocean, from the equator to 44° N. and 10° S. latitude. 

 They occur in herds, and their appearance is supposed to indicate 

 the resorts of the Cachalots. "Whether this whale is identical with the 

 , Grampus (Phoccma Orca) of the North Sea may be fairly questioned ; 

 but shoidd it prove to be so, the geographic range of the latter spe- 

 cies must be indeed extensive.— -5eMne<^ Whaling Voyage, ii. 238. 



Mr. Bennett mentions a KiUer which appears in smaU bands, 

 chiefly in the vicinity of the equator, of a moderate size, spouts much 

 like the Cachalot, and has a tall erect dorsal fin. — Bennett, I. c. 239. 



Sir Andrew Smith has given me the drawing of a species of an 

 Orca, from the Cape of Good Hope, which exactly agrees, in the dis- 

 tribution of the colour, with the Orca gladiator of the British coast. 

 It only differs from Schlegel's beautiful figure of the European Orca 

 in the bands which extend up the hinder part of the sides being 

 rather narrower and with more parallel edges, instead of broad, and 



