FAMILY BAL^ENHXE. 131 



Dimensions. Total length eighteen feet. From the posterior fold of the swimming paw to 

 the notch in the middle of the tail, eleven feet six inches. Girth at the swimming paws thir- 

 teen feet. Tail seventeen inches deep, and four feet nine inches across from tip to tip. 



I had no opportunity of determining its sex, but was informed that it was a female. 



The above description was taken from a whale captured in the lower bay of New- York 

 in 1822. 



THE NORTHERN RORQUAL. 



RoRadLUS BOREALIS. 



Balama Iripinnis maxilla inferiors rotunda. Sibbald, Phalainologia, Tab. 3. 

 Balana boops, Lacepede. Mitchill, Med. Repos. Vol. 7, p. 416. 

 Broad-nosed Whale. Scoresby. 

 Rorqualus borealis. Knox, Nat. Libr. Vol. 6, p. 125, pi. 5. 



Characteristics. Baleen divided into four or five thousand plates. Larger than the preceding. 

 Vertebrae 65. Length 50-105 feet. 



Description. Body not cylindrical, but compressed on the sides, and angular on the back. 

 Head smaller than in Balana. Dorsal elevation very small, triangular, opposite to the vent. 

 Swimming paws placed far back, long, slender, and pointed at the tips. Baleen 314 plates 

 on each side, extending about fifteen inches, and succeeded by a great number of smaller plates, 

 gradually changing to bristles. Vertebra? 65. The largest vertebrae are 14 inches in the 

 diameter of their bodies, and from 6-7 feet from tip to tip of their transverse processes. 



Color. Uniform black above, light beneath. Folds pale white, occasionally reddish. 



These two species resemble each other so much as to have been confounded together, until 

 the careful examination and comparison of two recent specimens enabled Dr. Knox to establish 

 their specific differences. The species is introduced here upon the authority of Dr. Mitchill, 

 who has furnished a very brief notice of a large whale exhibited in New- York in 1804. It 

 grounded, and was captured near Reedy Island in the Delaware. The following is all the 

 information furnished : " Length 38 feet ; circumference 18 feet ; expanse of the jaws at the 

 " extremity, 8 feet. No teeth in either jaw. Whalebone one to two feet long in the upper 

 " jaw, of a grey hairy appearance." This is very meagre, but is enough to indicate that it 

 should probably be referred to the above species. That it was clearly not the young of the 

 Right Whale, B. mysticetus, is manifest from the absence of a dorsal elevation, which led 

 Mitchill to refer it to the B. boops ; while its size and the peculiar appearance of the baleen, 

 would lead us to arrange it under the present species. It was a young individual. 



(EXTRA LIM1TAL.) 



Rorqualis australis. In 1837, the skull of a large whale was exhibited in New- York, under the im- 

 posing name of " Fossil Head of the Sea Serpent." It was reported to have been dug up near the 

 Balize, Louisiana, and was in the condition of a graveyard bone. It had been probably stranded, 



