218 CATODONTID^. 



2. Eogia Grayii. 

 Beak of skull much truncated and blunt, shorter than broad (that 

 is, as 14 to 8) at the occipital bone, and shorter than it is wide (that 

 is, as 7 to 9) at the notch. Teeth ^^=26. 



Euphysetes Grayii, W. S. MacLeay, ( Wall) Hist. New Sperm Whale, 

 1851, 8vo, p. 37. t. 2 (skeleton). 



Inhab. Australia. 



" Head short and very broad, with a low snout, a convex forehead, 

 at the base of which was a large singlt blowhole, placed at about the 

 middle of the head (aperture circular ? or lunate ?) ; the snout turned 

 up with a margin like that of a pig ; roof of the mouth with a series 

 of sockets on each side for receiving the teeth of the under jaw ; 

 under jaw very thin, narrow, subcyhndrical, with hoUow conical 

 teeth inserted somewhat horizontally, with the points slightly curved 

 upwards, and worn at the tips ; the eyes low down, in front of a 

 very weak pectoral fin. Dorsal fin like that of a Dolphin ; the front 

 edge rather convfex and inclined backward at an angle of 45° ; the 

 hinder edge more perpendicular and concave ; it was about 3| inches 

 high, 6 inches long at the base. The caudal fin triangular, hinder 

 edge sinuated, with a small deep central emarginatiou and acute 

 tips. The length was 9 feet, and the tail 2 feet wide. 



" The skeleton (with the cartilages) is about 8| feet long. The 

 skuU is 16| inches long, and not symmetrical. 



" There is the same want of symmetry, the same distortion of the 

 bones, and the same concavity of the upper surface of the head, 

 formed by the enormous development of the base of the maxiUaries, 

 and the same convexity of the roof of the mouth, as are foimd in the 

 genus Gatodon, and there are some anomalies that render the forma- 

 tion more divergent from that of the Dolphins in the last-named 

 genus. Owing to the great breadth of the vomer, the snout forms 

 from the notches an almost equilateral triangle, with a short, blunt 

 emarginate point instead of the long and sharp one of the genus 

 Catodon. The intermaxiUaries barely pass beyond the point of the 

 maxiUaries, but, as in the Sperm Whale, the right intermaxillary 

 mounts nearly to the occiput, high above the right nostril, which is, 

 as it were, almost carved out of it. Instead of a perpendicular and 

 semicircular wall formed by the maxiUaries, and doubled by the 

 occipital, forming the back of the great cavity on the summit of the 

 head, as in Catodon, in this genus the cavity, although it is completely 

 formed at the back by the maxiUaries, divides as it were into two 

 unequal parts by a ridge of bone, which is twisted towards the left 

 side of the head ; this prominent, thick, and sinuated central ridge is 

 formed by the base of the left maxillary and the base of the right 

 intermaxillary, which both meet at the summit of the head. The 

 right intermaxUlary does not join the occipital, but is separated from 

 it by a thin edge of the right maxillary, so that the occipital is 

 doubled in front by the base of the maxiUaries above. The left 

 intermaxiUary is much shorter than the right one, and mounts no 

 higher than the wall of the left nostril, which it partly forms ; the 



