REPORT ON THE SEALS. 91 



Broca, Paul, Anatomic comparee des circonvolutions cerebrales ; Le grand lobe limbique et la seissure lirabiquc 



dans la serie des Mamrniferes. Revue d'Anihropologie, ser. 2, t. i., 1878. [He figures the brain of the 



Seal] 

 "Watson, M., and A. H. Young, On the Anatomy of Hyaena crocuta (H. maculata). Proc Zool. Soc. Land., 



1879, pp. 79-107. 

 Krueg, J., Ueber die Furchen auf der Grosshirnrinde der zonoplacentalen Situgethiere. Zeitschr. f. toiss. Zool., 



Bd. xxxiii., 1880, pp. 595-672, pis. xxxiv.-xxxviii. [He figures the brain of Phoca vitulina, and copies 



Murie's figures of Otaria jubataJ] 

 Miclucho, Maclay, Remarks about the Circonvolutions of the Cerebrum of Canis dingo. Proc. Linn. Soc. 



N.S.W., 1881, vol. vi. 

 Schwalbe, G., Lehrbuch der Neurologie, Erlangen, 1881. 

 "Wilder, Burt G., and Simon H. Gage, Anatomical Technology as applied to the Domestic Cat. New York 



and Chicago, 1882. 

 Langlet, J. N., The Structure of the Dog's Brain. Journal of Physiology, vol. iv. p. 248, no date. 

 Mivart, St. George, Notes on the Cerebral Convolutions of the Carnivora. Journ. Linn. Soc. Land. (Zool.), 



vol. xix., 1884, pp. 1-24. [He figures the brains of Phoca vitulina and Otaria gillespii.~\ 

 Familiant, Victoria, Beitrage zur Vergleichung der Hirnfurchen bei den Carnivoren und den Primaten. 



Inaugural Dissertation, Bern, 1885. 

 Flesch, Max, Versuch zur Ermittelung der Homologie der Fissura Parieto-occipitalis bei der Carnivoren. 



Festschrift fur Albert Kblliker, Leipzig, 1887. 

 Turner, W., The Pineal Gland (Epiphysis cerebri) in the Brain of the Walrus and Seals. Proc. Roy. Soc. 



Edin., December 19, 1887, vol. xiv. and Journ. of Anat. and Phys., January 1S88, vol. xxii. p. 300. 

 Theodor, Fritz, Das Gehirn des Seehundes (Phoca vitulina). Bericht der naturf. Gesellsch. zu Freiburg, 



I. B., Bd. iii., 1887. 



BRAIN OF ELEPHANT SEAL (Pis. VIII. , IX.). 



Weight and External Form of the Brain. — The brain of Macrorhinus leoninus 

 which I have examined was removed from the skull of the young female (d) killed at 

 Christmas Harbour, Kerguelen, on January 4, 1874, and at once placed in spirit for 

 preservation, without the pia mater having been stripped off. It reached me in good 

 condition, and weighed, after several years' immersion in spirit, 1 lb. If oz. avoirdupois 

 (17f oz.). As the brain loses considerably in weight from the action of spirit, the 

 normal weight of this organ is always greater during life than after being in spirit, so 

 that the fresh brain would have weighed in all probability several ounces more than is 

 expressed by the above figures. As the male brain, where the body of the animal 

 exceeds in size and weight that of the female, is heavier than the female brain, in all 

 probability the brain of the adult male Elephant Seal would be several ounces more than 

 that of this young female. 



The principal dimensions of this brain were taken with callipers, and are stated in 

 millimetres in Table XI. 



As the brain loses both weight and bulk, and to some extent shape, after pro- 

 longed immersion in spirit, it is necessary to correct, as far as possible, the dimensions 

 and form of a hardened brain. This may to some extent lie done by taking a cast of 

 the cranial cavity of the skull of the animal. I accordingly asked my assistant, Mr. H. 

 J. Stiles, M.B., to make a cast of the cranial cavity of the skull of the Elephant Seal from 



