Hectror.—New Zealand Cetaceans. 169 
BERARDIUS ARNUXII. 
Porpoise Whale. 
B. arnuxii (Duv.) Gray, Le. 348, Haast, Trans. N.Z. inst, II., 190. 
Knox and Hector, Trans. N.Z. Inst. IIL, 128, Pl. XVI. and XVIL 
Har bones; Pl. VI., 5a. and b, 
Teeth z; dorsal fin large, extended far back with a large boss in front 
of it; beak of skull sub-cylindrical, slender ; intermaxillaries linear, slender, 
rather swollen on the sides of the blowers, but not reflected to form a crest ; 
nasal bones swollen, as in Globiocephalus ; maxillary bones, shorter exter- 
nally than the intermaxillaries, flat and expanded over the orbits; teeth 
triangular, sub-compressed, with base rugulose; point acute and smooth 
in the side of lower jaw close to tip, but not protruded through the gum; 
pectoral fins triangular; colour deep velvety black, lighter beneath ; atlas, 
second, third, and fourth cervicals anchylosed ; fifth and sixth free. 
Skull, cervical vertebræ, hyoid, clavicle and sternebre, of a specimen killed 
in Wellington harbour ; prepared by Dr. Knox. 3 
Length 27 feet. : 
DESCRIPTION OF PLATES. 
Plate I.—Clymenia obscura, Gray. 
: Side and upper view of skull, one-fifth nat. size. 
Electra clancula, Gray. 
Side and upper view of skull, one-fifth nat. size. 
Plate II.—Delphinus forsteri, Gray. 
| Side and upper view of skull, one-fifth nat. size. 
Clymenia nove-zealandice, Forster. 
Side and upper view of skull, one-fifth nat. size. 
Plate III.—Dolichodon layardii, Gray. One-eighth nat. size. 
1, Lower jaw, from above. 4. Right tooth, side view. 
2 j p mde View. D , » from above. 
I p » front view. 
Electra clancula, Gray. 
Delphinus forsteri, Gray. 
(Reduced from PI. XXIV., “Voy. of Ereb. and Terr.”) 
Plate IV.—Epiodon chathamiensis. 
Side, lower, and upper views, one-eighth nat. size, 
Plate V.—E£piodon chathamiensis. 
la. Side view of lower jaw. 1b. Upper view of lower jaw. 
One-eighth nat. size. 
