580 MR, W. B. B. OLIVER . EEVIJiW OP THE 



" Pelorus Jack " has been described as " bluish- white tinged 

 with yellow and purple, and with irregular brown-edged scratch- 

 like lines in all directions. His flippers are blackish and mottled 

 with grey" (Cowan), Length about 14 ft. Dorsal fin high and 

 falcate, Tiiis famous cetacean for many years frequented the 

 waters outside the entrance to Pelorus Sound, and was in the 

 habit of meeting steamers on the route between Nelson and 

 Wellington. It accompanied the vessels for some miles, and 

 played from side to side of the bows, keeping just in front 

 and frequently leaping out of the water. It was protected by 

 an Order in Council. " Pelorus Jack " has not been seen since 

 1912. 



Cephalorhynchus. 

 CephalorhijncMs {^ Delphinus) Gray, 1846, Zool. 'Erebus' & 

 * Terror,' Mamm. p. 36 ; type, D. heavisidii Gray. 



Cephalorhykchus hectori. (PI, II. figs. 1 & 2.) 



Electra hectori Yan Beneden, 1881, Bull. Roy. Acad, Belg. 

 ser. S, vol. i. p. 887, pi. 2. Lagenorhynchus clangulus (not Gray) 

 Hector, 1870, Trans. N.Z. Inst. vol. ii. p. 27; id. 1872, Ann. 

 Mag. Nat. Hist. ser. 4, vol. ix. p. 436, fig, Electra dangula (not 

 Gray) Hector, 1873, Trans. N,Z. Inst. vol. v. p. 160, pi. 12; id. 

 1877, 1. c, vol. ix. p. 350, pi. 11. CephalorJiynchiis hectori Ben., 

 Hector, 1885, Trans. N.Z.Inst. a'oI. xvii. p. 209; True, 1889, 

 Bull. U.S. Nat, Mus. sxxvi. pp. 112, 177, pi. 32. Cephalorhtjn- 

 chus alhifrons True, 1899, 1. c. pp. Ill, 177, pi. 32. 



Confined to New Zealand seas. It is the Common White-nosed 

 Porpoise, never seen far from the coast. 



North Coast.— Specimen captured. Skeleton in Paris Museum. 

 Described by Van Beneden as the type of Electra hectori. Teeth 30, 

 Yertebraj: C. 7, D. 14, L. 15, Ca. 27=63. Two cervicals fused. 

 Ribs 14. 



Bay of Islands. — Skull in Dominion Museum. Teeth 30. 

 Length of skull 30-5 cm., of rostrum 14-5 cm. ; width of rostrum 

 at base, 7-5 cm. 



Wanganui Coast. — (a) Skeleton in Wanganui Museum , Sternum 

 of two segments ; four pairs of ribs articulate with the anterior 

 and one pair with the posterior segment, which is perforated. 

 Two cervicals fused, (b) StuflJ'ed skin in Wanganui Museum. 

 Specimen stranded alive, Castleclifi" Beach, May 1921. Mr. G. 

 Shepherd, Curator of the Wanganui Museum, has kindly supplied 

 me with a description which enables me to give the following 

 particulars. Forehead grey. Snout and a mai-gin round the 

 grey of the forehead, black. Dorsal surface slaty black, shading 

 into slaty grey on the sides and then into black bordering the 

 white under surface. Tip of lower jaw, flippers, dorsal fin, and 

 tail black, A white spot in the axil of each flipper. Under sur- 

 face white, interrupted by an isthmus of black connecting the 

 two flippers. The white extends backwards to midway between 



