26 



** Dorsal Fin behind the middle of the hack, triangular. 

 The Beaked Hyperoodon. Hyperoodon rcstratuin. 



Blackish ; pectoral nearly \, and dor.sal f the length 

 from the tip of the beak ; blowers lunate, concave in front. 



Var. I. Black above and below; vcrtebrw 46, 11 lumbar 

 and 19 caudal. " Blowers concave towards the head, ra- 

 ther in front of the eye ; palate smooth ; " Wesmael. 



Inhab. North Sea. 



Hyperoodon rostratum, Wesmael, Acad. Brux. 1840, 

 xiii.^1,2. 



Balwna rostrata, Chemnitz, Berlin Besch. iv. 183, hence 



Deljahinus Chemnitzianus, Blainr. 



Length, entire, 6'70 meters. 



„ to blowers, 1"24 



„ to eye, r06 



to point of dorsal. 



4-40 

 0-70 

 517 

 1-40 

 0-86 

 3-76 



„ of pectoral, .. 



„ to vent, 

 Breadth of pectoral,.... 



„ of face. 

 Circumference, 



Var. 2. Blackish brown, beneath brownish white. Ver- 

 tebrsE 45 ; 12 lumbar and 17 caudal, F. Ciiv. 



Bottle-nose Whale of Dale, Hunter, Phil. Trans, \kxyu. 

 t. 19, copied Bonnat. Cetac. t. 11,/. 3. Bell, Brit. Quad. 

 292,/. 



Delphinus Hunteri, Desm. 



D. diodon, Lacep. 



D. bidentatus, Bonnat. from Hunter. 



Hyperoodon, Cuv. Oss. Foss. v. 321, t. 24,/. 19, 21, co- 

 pied from 



B. a museau pointu. Camper, Cetac. 78, t. 13 — 16. 



Cetodiodon Hunteri, Jacob, Dublin Phil. Jour. 1825, t. 



Hyperoodon, Thompson, Mag. N. Hist. 1838, 221. 

 Annals <^ Mag. N. H. 1846. 



Inhab. North Sea. Thames, Hunter. Humber, Thomp- 

 son. 



Length, entire, 21 feet. Skeleton, Mus. Col. Surg. 



The skull of this specimen is about 45 inches long, and 

 the elevated plates of the maxillary bone are thin, leaving 

 a broad space between them, in front of the blowers, 

 and as high as the frontal crest. 



By the kindness of my friends, Mr. Pearson, of the Hull 

 Philosophical Society, Mr. Ball, of Dublin, and Mr. W. 

 Thompson, of Belfast, who have sent me various detailed 

 drawings of the head of the Hyperoodons taken off the Bri- 

 tish and Irish coasts, in their possession ; they appear 

 all to belong to one species, the same as Hunter's spe- 

 cimens in the College of Surgeons, and the skull fi- 

 gured by Camper and Cuvier. These materials have 

 made me quite satisfied that the skull of H. latifrons 

 must be the remains of a perfectly distinct species : it not 

 only differs from this in the thickness and solidity of the 

 crest, but in the crest being much higher than the hinder 

 part of the skull, while in all the heads referred to, the 

 crest is of the same height with the frontal ridge. The 

 skeleton which has lately been added to the Anatomical 

 Museum of Paris agrees with the above-named specimens 

 in these particulars. 



Var. 3. Blackish gray, paler on the belly and round the 

 eyes; upper part of lower jaw yellowish marbled; teeth 

 none ; the edge of the lower jaw shuts into a correspond- 

 ing groove in the upper jaw ; blowers lunate, with the 

 concavity in front, exactly over the eye, 6 in. by 3. 



Hyperoodon, " Voighfs Mem. t. " F. Cuv. Cetac. 245. 



Inhab. North Sea, Kiel. Skull, Kiel. Bot. Card. 



feet. 



The dorsal fin is said to be 12 feet from the blower, but 

 that makes the body too long for the measurement. 



Desmarest and Lesson have mistaken the upper for the 

 lower jaw, in Chemnitz' description, {Desm. Mam. 520. 

 Lesson, Mam. 427. Cetac. 120) ; and M. F. Cuvier has not 

 well understood it, as pointed out by M. We.smael, /. c, 

 and Illiger makes the same mistake with regard to his 

 species. 



This species has been well described by M. Dumortier 

 and by Mr. W. Thompson, of Belfast, in the ' Annals and 

 Magazine of Natural History,' 1846. 



Physeter bidens (Sowerby) has been refeiTcd to this ge- 

 nus, but the form of the head and position of the fins, the 

 teeth, and the form of the skull, show it is a Ziphiiis. 



The CoESiCAN Hyperoodon. Hyperoodon Doumetii. 



Hyperoodon, Doumet, Bui. Soc. Cuvier. 1842, 207, t. 

 l,/2. 



Jaws paved with acute tubercles ; dorsal % the length 

 from the tip of the jaws : blowers lunate, with the convex- 

 ity in front. 



Inhab. Corsica. 



" Jaws toothless, but paved with small, long and acute 

 tubercular granulations; lower jaw with 2 rather longisb, 

 acute, slightly arched and longitudinally grooved teeth in 

 front ; larynx with a kind of funnel at the base of the 

 tongue, like the beak of a duck, or rather of a spoonbill, 5f 

 inches long ; gape small ; beak conical ; eyes small, near 

 middle of head ; blowers lunate, with the points directed 

 backwards; pectoral fin 19 inches long, 6f wide; dorsal 

 nearly 8 inches high, 49^: inches from the tail ; the tail is 

 broad, lobes equal." Doumet. 



According to this description the dorsal fin of this spe- 

 cies must be further back than in any other of the genus, 

 and the pavement of the jaws is quite peculiar. It agrees 

 with Dale and Baussard's descriptions in the fonn of the 

 blower, but differs from them in the position of the dorsal. 



