222 DR. J. E. GRAY ON BRITISH CETACEA. [May 24, 
rate form of the lateral processes. In the Plymouth specimen of the 
latter in the Museum, the bodies of the cervical vertebrae are oblong, 
transverse, being one-third the width broader than high. 
The short baleen forms the front part of the series, in which the 
layer in the middle is dark slate-coloured, and the intermediate- 
sized blades are more or less slate-coloured on the outer and white on 
the inner side. The breast-bone is lozenge-shaped, with a large 
central perforation. 
Mr. Heddle gives a long account of this species in his paper in 
the ‘ Proceedings of the Zoological Society’ above referred to. 
*** The upper and lower lateral processes of the third, fourth, and 
Jifth cervical vertebre short, strong, separate, directed laterally; 
the lateral process of the second cervical short, truncated. 
Puysaus sippaLpit. (Fig. 15a.) 
Physalus (Rorqualus) sibbaldii, Gray, P. Z. 8. 1847, 92; Cat. 
Cetac. 42. 
Hab. North Sea, ascending rivers; in the Humber, Yorkshire ; 
skeleton in Museum of the Hull Royal Institution and Literary and 
Philosophical Society. Length 50 feet. 
The skeleton in the Hull Philosophical Society’s Museum is 47 feet 
long, and evidently of a young animal ; the arm or paddle is rather 
more than 6 feet long. The baleen is all black. The cervical vertebrze 
are all separate ; the second cervical vertebra has a broad lateral ex- 
pansion, and is oblong, obliquely truncated from the wide upper to 
the narrow lower edge, and with a small oblong subcentral perfora- 
tion near the base; the third, fourth, fifth, sixth, and seventh cer- 
vical vertebre have a straight, rather elongate lateral process, which 
projects straight out from the body of the vertebra, and the upper 
and lower ones are of nearly equal length. The end of the first rib, 
near the vertebra, has a single head; and the second rib has a com- 
pressed internal process. 
a \ 
are 
Second and Fifth Cervical Vertebre of Physalus sibbaldit. (From a sketch by 
Mr. Harrison, of Hull.) : : 
Fig. 15 a. 
4, SIBBALDUS. 
The pectoral fins moderate. The second cervical vertebra with 
