MAMMALIA. 
37 
I 9. Rorqnaliis {Phf/salus) antiquorum. Not very rare. 
M. Jouan records the capture of a Whale which he has determined as 
Rorqualus musculus, on the coast of Cannes (South of France), in May 1864, 
Mem. Soc. Sc. Nat. Cherbourg, 1864. 
Bah^na. Dr. Gray makes some observations on a singular horny excres- 
cence on the skin of the jaws of some Whales, called bonnet ” by the 
whalers, lie gives the different opinions on its origin, and believes that a 
prominence of this kind is to be observed in all the species of the genus 
Balana, although it may be of various form and texture. Proc. Zool. Soc. 
1864, p. 170. I 
Balcena mysticcim. Prof. Eschricht has given an account of the annual 
migration of this species, based upon observations continued during thirty -five 
years at different stations on the coast of Greenland ; it arrives there in the 
beginning of December, and in its return northwards leaves again the seas in 
66° 56' N. lat. in March, and those in 69° lat. in the month of May. 
Balrenoptera rostrata (Fabr.) . Mr. Flower has given a most 
accurate description of the skeleton of a male specimen, 24J feet 
long, which was .washed ashore on the Norfolk coast in 1860, 
and which fortunately fell into the hands of Mr. J. H. Gurney, 
who, with a rare love for natural science, is always ready to pro- 
mote its advancement. In the course of the description, the 
author points out several differences between his specimen and 
those previously described ; but they are probably merely indi- 
vidual characters, and, moreover, Dr. Gray refers the specimen 
to the same species as Mr. Flower. He is inclined to regard 
the number of vertebra3 as constant in a species, that of Balmno- 
ptera rostrata being fifty. Proc. Zool. Soc. 1864, p. 252. 
The capture of a specimen of the same species off the coast of Northumber- 
land on the 6th of February 1858, with the measurements given by Mr. J. 
Ilancoclc, is recorded by Messrs. Mennell and Perkins in Trans. Tyneside Nat. 
Field Club, 1864, p. 160. 
^ Bolmnoptera gig as. Hr. Malmgren supposes that he has once seen this 
species in the sea of Spitsbergen, and that it sometimes occurs on the coast of 
Finmark. Wiegm. Arch. 1864, p. 94 (Qi)fvers. Svensk, Vetensk. Akad. 
Ffirhandl. 1864, p. 153). 
-^Ilyparodon rostratus (Pontopp.). This species, named “Dogling ” by the 
Scandinavians, was observed by Hr. Malmgren between 74° 5' and 75° 5' 
lat. N., and 12° and 13° long. E. They were seen in water of a temperature 
of from 2° to 3° 11., but disappeared when the temperature fell to the freezing- 
point. Wiegm. Arch. 1864, p. 93 (CEfvers. Svensk. Vetensk. Akad. Forhandl. 
1864, p. 150). 
“4 Ziphins indicus, sp. n,. Van Beneden, Mem, Cour. Acad. Sc. Belgique, 1864, 
xvi., from the Cape of Good Hope. Only the skull is known, which is fully 
described and figured. 
^ 3Iesoplod(m soioerhiensis. M. Van Beneden has given the history of our 
knowledge of this species, and a detailed description of its skeleton, in Mem. 
Cour. Acad. Sc. Belg. 1864, xvi. The skeleton is figured. 
A Monodon monoceros. The Narhval leaves Spitsbergen in summer for more 
