R.-J. ANDERSON — CETACEA | 705 
antero-posterior diameters of these pieces are of one (1) 14 cm. middle 
line (2). 10 em. to 4°*,7 (3). 8°%,5 to 9°",7 (4). The breadths are (1). 14 
cm. to 8°*,5 (2). 11 cm. to 8°°,5 (3). 5°°,5 to 13 cm. (4). 18 cm. sides to 5 
em. The lower four cervical vertebræ are free. The skull of the first 
was figured in the Irish Naturalist. The outline sketch, which appeared 
in the paper on the Premaxilla in the Berlin Transactions, was figured 
side by side with a piece of the skull of Orca gladiator, which was also 
cast on the Western Shore. 
The second specimen is that of the skull (lower jaw was wanting) of 
Grampus griseus, which was stranded near the city of Galway the young 
offspring seem to have got on shore first and the dam afterwards. We 
were not able to get the entire animal and the skull wants the mandible. 
Prof. THompson got what remained of the young specimen. 
The skull is 6 em. long, 33 cm. wide at the broadest part. 
The premaxillæ are 35,5 left, 35 em. right long from front to back 
and reach to the tip of the beak, each has a foramen one quarter of an 
inch in diameter at its apex and other foramina further back. 
There are no teeth in the upper jaw. A groove reaches along each side 
of the upper jaw for a distance of 115" from the apex. The intermaxillæ 
show for 6 em. in the middle line of the palate. The posterior end of the 
palatine surface formed by these bones is pointed. The maxillæ reach 
back far between the palatines reaching almost to the pterygoids. 
The vomer does not appear between the maxillæ in any part of the 
palate. 
The palatine of the right side does not seem to reach the middle line. 
The difficulty of determining the condition is due to anchylosis. The 
obliteration of the pterygopalatine suture on the other side renders the 
exact boundary lines of the bones where they touch difficult to follow. 
The pterygoids meet mesially behind the palatines. 
The occipital condyles are 63*" apart behind and 2 cm. apart in front. 
The intermaxillary groove has the vomer lining its floor. It is 3 cm. 
deep behind and 1 em. in front. The breadth is 17** in front and 7°" 
behind. 
The left nasal is rather more than half the breadth of the right one. 
The breadth of the right Intermaxilla is 6 cm. and of the left 4°",5 at an- 
terior part of superior nares. 
The cranial cavity is 16°*,5 from before back, 23°%,5 from side to side, 
and 16,5 from above down’. The premaxillæ shut out almost comple- 
tely the maxillæ from the superior narial orifice. The grey Grampus 
approaches globiocephalus in the shape of the skull but in the edentulous 
! Dimensions of brain cavity in a large skull of Æyperoodon 23°m,5 long X 17em,5 
high x 33 cm. wide. 
