CETACEA—LILLIE. 95 
animals to avoid touching the rocks in such places. Whalers maintain that Hump- 
backs consciously rub themselves against rocks in order to remove the barnacles which 
invariably adhere to this species. There may be some truth in this belief, but I found 
open wounds on the body of the specimen of Balaenoptera borealis Lesson, which was 
caught off the Bay of Islands; and the scars on this whale were identical in appearance 
with those on the Humpbacks. Healed scars, such as are represented in text-fig. 4, 
B, c, have been seen in other species of Balaenoptera.* The members of this genus 
are known to be free from barnacles, yet, if we may judge by the scars, they would 
appear to be in the habit of occasionally brushing up against rocks. It is possible that 
some of the scar-markings may be due to parasites beneath the epidermis. Mr. Cook, 
who has watched the Humpbacks off the north of New Zealand for twenty years, told 
me that he noticed more scars on the animals when they were on their southward 
migration. (Sve p. 110.) 
BALEEN. 
The whalebone-plates were uniformly black in colour, with the exception of a few 
plates on either side of the anterior end of the snout (PI. I). About three or four of 
these plates on each side were entirely white ; the others were black on the outer edges, 
with bands of white on their inner sides. 
The hairy inner edges of all the plates were greyish-white in colour. The 
individual bristles were coarse, and when seen en masse they had a slight appearance 
of waviness. The largest baleen-plates seldom exceeded 20 inches in length. The 
whalebone agreed in every character with that of the Northern members of the species.t 
In an embryo, 133 feet in length, the baleen-plates were relatively narrow and 
only covered the outer edges of the palate. It would appear that after birth the 
baleen-plates increase in width until they cover the whole surface of the palate, with 
the exception of the median crest or keel. 
Hatrs. 
Short hairs or vibrissae were found to occur on the facial region in Jlegaptera 
nodosa, very much as they do in Balaenoptera,t with the exception that many of them 
were situated upon dome-shaped humps or tubercles. On the dorsal surface of the 
rostrum or beak there were generally three hair-tubercles on each side of the blowholes. 
About five formed a median line down the snout, from the nostrils to its tip. (See 
text-fig. 5, A., and PI. II, figs. 4 and 6.) Some eight or more occurred on either side of 
* Collett, R., Proc. Zool. Soc., 1886, p. 265. Lillie, D. G., Proc. Zool. Soc., 1910, p. 783. 
+ Struthers, J., Journal of Anatomy and Physiology, 1888, Vol. XXII., p. 121. True, F. W.,“° Whale- 
bone Whales of the Western North Atlantic,” Smithson. Contr. to Knowledge, 1904, Vol. XX XTITI., p. 230. 
t Lillie, D. G., Proc. Zool. Soc., 1910, p. 773. [Nors.—This paper appears in the “ Proceedings” 
with text-fig. 70, p. 775, turned upside down. The mistake was entirely the fault of the printers, who 
took the figure out to repack, after the proofs had been passed for press, and put it back reversed. | 
Burfield, 8. T., Report on Belmullet Station, British Ass. Rep., Dundee, 1912, p. 177. 
Pp 2) 
= 
