CETACEA OF THE NEW ZEALAND SEAS. 585 



with the sternum. Sternum of 4 fused segments, (d) Skull in 

 Dominion Museum, labelled "Dusky Bay, 6/1/73." 



Locality not stated. — (a) Skeleton in Wanganui Museum. 

 Teeth If. Vertebra) : 0. 7, D. 12, L. 17, Ca. 22+ =58 + . Ribs 12, 

 of which 5 are two-headed. Two cervicals fused. (6) Skull 

 (incomplete) in Dominion Museum. Labelled in Dr. Knox's 

 handwriting '■'•Beluga kingii Gray. The Australian Beluga. 

 From Swainson Coll." This is merely an imperfect cranium ; 

 the whole of the rostrum and mandible are missing. It is from 

 a young animal, as the frontal is quite separate and the cranial 

 sutures are open. It appears to agree in all essential characters 

 with the skulls of Titrsiops truncatits in the Dominion Museum. 

 The main point of difference which gives the present specimen a 

 distinct appearance is the absence of a transverse supraoccipital 

 ridge, but this is obviously dvie to age, and could not be expected 

 to be pronounced in a young animal. This specimen was referred 

 to under the name Beluga kingii by Hector (1873), and is 

 responsible for the introduction into New Zealand literature of 

 the " White Whale, Beliyhinapterus leucas" which finds a place in 

 Hutton and Drummond's ' Animals of New Zealand,' but has 

 been treated more cautiously by Waite, who omitted it altogether 

 in his ' Guide to the Whales and Dolphins of New Zealand.' 



EXPLANATION OF THE PLATES. 



Plate T. 



Neohalwna marginata. 



Fig. 1. Skull, lateral view. 



2. Skull, superior view. 



3. Skull, inferior view. 



PliATE II. 



CepTialorhynchus liectori. 



Fig. 1. Side view. 



2. Inferior view. 



K.ogia hreviceps. 



Fig. 3. Specimen stranded at Wanganui, 

 February 1909. 



Plate III. 

 Mesoplodon hoivdoini. 



Fig. 1. Skull, superior view. 



2. Skull, inferior view. 



3. Skull, lateral view. 



Plate IV. 

 Mesoplodon hoivdoini. 

 Fig. 1. Mandible. 



2. Left ramus of mandible. 



3. Scapula. 



