218 DR. J. E. GRAY ON BRITISH CETACEA. [May 24, 
Tympanic Bones of Physalus antiguorum, from Devonshire. 
at Zoological Gardens, Edinburgh. Coast of Hampshire, 1842; ske- 
leton at Black Gang Chine. Plymouth, 1831; skeleton in British 
Museum. The Hope Reach, near Gravesend, 1858 or 1859 ?; ske- 
leton at Rosherville Gardens, 1864. Alloa, Frith of Forth (Nez/), 
male. Burnt Island, 10th June, 1862 (Walker). Plymouth, 1863 
(Gerrard) ; skeleton in Alexandra Park. 
Skeleton in Zoological Gardens, Antwerp (see Bull. Acad. Roy. 
Brux. xxiv. 3). Skeleton not mounted, Museum Paris. Skeleton, 
Museum Louvain, 1836, 60 feet long. Holland, 1836. 
In the normal state of the cervical vertebrze of this species, both 
the upper and lower lateral processes of all of them are developed 
and united into rings. This is the case in the skeleton in the British 
Museum, and in that, from the Thames, in Rosherville Gardens. 
But this is subject to some variation: in the specimen from Ply- 
mouth, prepared by Messrs. Gerrard, now in Alexandra Park, the 
lower processes of the sixth and seventh cervical vertebree are abor- 
tive, in the sixth they are reduced to small tubercles, and are en- 
tirely wanting in the seventh. 
The different English skeletons of this Whale which I have ex- 
amined and which are adult, or at least nearly of the same size (that 
is, from 70 to 80 feet long), show considerable variation in the form 
and in the size of the perforation, and in the development of the 
rings of the lateral processes of the hinder cervical vertebree, show- 
ing that there are several species, or, what is more probable, that 
their bones are liable to a considerable amount of variation. 
The skeleton which is now in the British Museum is said to 
