418 MR. W. H. FLOWER ON THE SKELETONS OF WHALES [Nov. 8, 
Of the Lesser Fin-Whale (Balenoptera rostrata) there are two 
skeletons—the first a very beautiful and perfect specimen, from the 
same locality as the last-mentioned skeleton. The baleen is zn situ 
on both sides of the mouth, never having been removed. The animal 
was in the adolescent stage. The epiphyses of the upper end of the 
radius and ulna are united, but that of the head of the humerus is still 
separable. The entire length is 23! 2", of which the head occupies 
5! 2", The vertebral formula is C. 7, D. 11, L. 12, C. 17=47; but 
one or more bones are wanting from the end of the tail. The cervi- 
_ cal vertebree are all free. The upper and lower transverse processes 
of the sixth are united on the right side, but separate on the left. 
The other skeleton of the same species is rather larger, but not so 
complete. The cervical vertebrze are all free, and none of the trans- 
verse processes (excepting those of the second) are united at their 
ends. 
The second division of the Cetacea (the Delphinoidea) is repre- 
sented in the Brussels Museum by two skeletons of Hyperoodon (one 
nearly adult, 23! long, with two small sharp teeth at the extremity 
of the lower jaw, and the other young), the unique skeleton of Meso- 
plodon sowerbiensis (described by Du Mortier and afterwards by 
Van Beneden), Orca gladiator (an adult and young), Glodioce- 
phalus svineval (adult), Beluga leucas, Monodon monoceros, and 
five examples of the genus Delphinus. 
The resources of the museum of the University of Louvain being, 
of course, not equal to those of a national establishment, its col- 
lection of Cetacean skeletons, though illustrative of most of the prin- 
cipal types, and all in excellent condition, is necessarily limited to 
individuals of moderate dimensions. Hence the Balenoidea are not 
so well represented as the Delphinoidea; and, as they all belong to 
well-known species, few notes will be sufficient. 
Eubalena australis? (Cape Whale).—Imperfect skull, 8! 4" long, 
of a young individual. 
Megaptera longimana.—Complete skeleton of young, 32! 2" long, 
of which the head is 8’ 6". Vertebree, C. 7, D. 14, L. and C. 31 
=52. Ribs 14 pairs. Sternum with a very deep notch in the 
middle of the upper border. Upper and lower transverse processes 
of the axis further apart at the ends than in the Brussels specimen. 
Upper processes of the third, fourth, fifth, and sixth slender, almost 
straight, and of nearly equal length. Lower processes much shorter, 
and gradually diminishing from the third to the sixth ; absent in the 
seventh. 
Physalus antiquorum.—A fine cranium from the Jutland coast, 
about 15' in length. It is rather narrow posteriorly in proportion to 
its length; and the nasal bones, though of the general form charac- 
teristic of the genus, are very narrow, and pointed at their hinder ends. 
Balenoptera rostrata.—Skeleton of a young individual, marked 
B. minima, and said to belong to a small variety only found among 
the Right Whales of Greenland. ‘The total length is 17! 3!; but 
several vertebrae are wanting from the end of the tail. The skull is 
4' long. There are 7 cervical, 11 dorsal, and 12 lumbar vertebree, 
and 11 pairs of ribs. The cervical vertebra are all free, and the 
