THE WHAXEBOXE WHALES OF TUX WHKTKkV XOBTH ATLASTIC. 



181 



Length of pectoral along anterior border 8 ft. 8 in. 



" to termination of white 



under-surface 8" 3 



Greatest breadth of pectoral 2 " 2 



Breadth of flakes 14 " 10 



Distance from flakes to anus 20" o 



Center of anus to center of navel 10" o 



Breadth of caudal peduncle at insertion of flakes i " 8 



Tip of mandible to corner of month (along the carves) 16 " 10 



Corner of mouth to auricular orifice 3" 6 



Distance across the head 13" 6 



Length of auricular orifice o "' 2} 



" the dorsal fin (Ives) i " o 



Height of the same (Ives) o" 5 



It is an unfortunate fact that no complete reliable account of the osteology of 

 B. mtixculu* has been published, unless it be that of Malm. His Monographic 

 il/uztree is not accessible to me. Equally to be regretted is the fact that the meas- 

 urements given by Flower (4-5), Reinbardt (Jo), and Malm (66) are not in accord. 

 On that account a thorough comparison of the proportions of the skeleton cannot 

 be made. 



The osteological characters of B. musculus are summarized by Van Beneden 

 (7, 260) as follows : 



" This species is distinguished from other Balaenopteras by the beak, which is 

 very broad, especially at the middle of its length ; by the nasal bones, truncated in 

 front; and by the palatines, very broad. The upper jaw is exceeded by the 

 lower, and the coronoid process is high and pointed ; the vertebrae number 63 or 

 64; the ribs are 15 or 16 pairs in number; the sternum is broad and short; the 

 metacarpals and phalanges are comparatively long." 



JTOCKER OF VHETEBRJBL 



The vertebral formulas given by various European authors for B. ntusculus 

 are as follows : 



BALJKSOFTERA JfCSCTXCS (L.V. ECTlOPKASr. VERTEBRAL FORMULA. 



.-. . ' ' . - 



_:_.- -.- 



~ = ?. 



c. 



D. 



Ca. I Total. I Type at. 



1 According to Lahille, the formula for both is generally given as 7 -f- 16 + 15 + 26 = 64 ; bat 

 Gervais says it should be 7 -f- 16 + 13 + 28 = 64, 



' * The two skeletons [Hall and Utrecht] agree in possessing sixty-four Tertebrae, both being 

 in this respect, fortunately complete " (Flower). ' Lnmbars 15 or 16 (Flower, 45, 410). 



* Jardine, Nat. Library, Cetacra, has a figure of this skeleton on plate 6. The lumbars appear 

 to be 16. 



