10 PROFESSOR FLOWER ON RISSO’S DOLPHIN. 
skull of the animal next to be described are also appended for convenience of com- 
parison) :— 
Skull of adult. Skull of young. 
inches. inches. 
intire lemeth 2 tee in 8 eo a 19:2 13°6 
Tbeneth of rostrum 5 oss gis =) ys ee eee 9-3 6-1 
Breadth of occipital foramen . . . - - + «© + = : 15 1-2 
Greatest height of occipital foramen . - . . - - . 1-9 Hey 
Breadth of occipital condyles. . . - - - + + = + 4:5 3:2 
Greatest breadth of cranium (at eae Be in ao 
fossa). . : 91 PF 
Greatest preadi’ of qe (at ZY some process a 
squamosals). . . .- : Ae ieee 9-0 
Breadth at anteorbital processes of froritale ss ep eee els 8:2 
Breadth of anterior narial apertures. . . States ean 2°2 
Breadth of rostrum at base (bottom of aticorbyead motch)). ii 5°6 
Breadth of rostrum at the middle . . . .... . 44 3:3 
Tensthvot tympanic bone |. & ter ee 1:6 
Mandible—Leneth ‘of ramus: ae sen 2 ee 10°6 
Lensth‘of sympitysies 2 oc ee ee 1:2 
Breadth at condyles’ :™ -) <<)". ) fae step edad 
Height at coronoid process . . . . . + 43 2:7 
Hyoid.—Breadth between tips of thyro-hyals. . . . . 87 
Basi-hyal.—Greatest antero-posterior length . . . . . 3 
The bones of the pectoral limb generally present a nearer approach to those of Glodi- 
cephalus than any other Cetacean, or, rather, may be described as intermediate between 
that genus and Delphinus proper. 
Of the two scapule figured by Van Beneden and Gervais, one of G. rissoanus, and 
the other of G@. griseus, the present one most nearly resembles the latter in outline, 
especially in the form of the acromion ; it is rather smaller, however, in all its dimen- 
sions, in which respect it is more like the former. 
The humerus is immovably united with the radius and ulna. These bones are not 
so broad in proportion to their length as in Globicephalus. 
The carpal bones are five in number, and form a close mosaic, three in the first and 
two in the second row, and have precisely the same arrangement as in Globicephalus. 
The pollex consists of a short, nearly square metacarpal, and a single, conical, tapering 
phalanx, reaching nearly to the end of the second metacarpal. It is certain that no 
other ossified phalanx was present in this digit on either hand—a circumstance which I 
note particularly, because in Gervais’s figures’, both of G. griseus and G. rissoanus, there 
‘ Measured from a line drawn between the anteorbital notches. 2 Op. cit. pl. 54. figs. 10 & 5. 
