949 Transactions.—Z oology. 
that it is the only ziphioid whale that has three cervical vertebre anchylosed 
and four separate ;* but Berardius has this character, and the two skeletons 
of M. hectori differed in this respect, one having two and the other four 
vertebre anchylosed. 
Although it is most probable that the hypertrophy of the teeth in this 
species is only analogous to the overgrown tusks occasionally met with in 
wild boars, it may be as well for the present to treat it as a character of 
specifie value until further information is obtained about this whale in its 
earlier stages of growth. 
As an aid to the comparison of the various forms comprised in this most 
puzzling genus Mesoplodon, I have compiled the following table of measure- 
ments from the various sources at command :— 
A.|B.|O.| D.| E. | F. | G. H. | L | K. Ti 
Length of skull .. 28-0 30-0 28-5 29:5/31:0/36:5| 37-0 ? | 35-0 ? | 24:0? | 41-7 
»  Oferanium  |11:5|12:0| 8:5|10-5|13-0]13:5| 1445 | 13-5 9-0 | 15-7 
»  Ofbeak  .. |17:5|18:0| 15-0) 19-0) 18-0) 23-0| 22-5 |215 |150 | 26-0 
»  Ofmandible | 24-5) 25-5) 19-0) 25-5) .. |34-0/31-0 |300 |190 | 34-7 32-0 
» Of symphyses 7-0) 5-2) 6:0| 6-0) .. |14-0,1L.0?|10:0?| 5-02] 80 |100 
Frontal width .. |12-0)12°5| 9-5) 11-0)11-0} 14:0) 19-0 | 19-0 9-5 |150 | 15-0? 
Distance of tooth from 
i andible .. | 8-0} 3-0) 1-0| 4-0| .. |11-0/10-5 |10-0 5:0 87 {11:5 
A.—Mesoplodon sowerbyi, Van Beneden. 
B.— M. europeus, Van Beneden 
C.—M. hectori, Tetai Bay, Colonial Museum, 
D.— i Lyall Bay, 
E.—Skull in Canterbury edge no mandible. 
F.—Skull in Otago Museum (Pl. X 
G.—Oulodon, No. L, v. Haast. 
H No. II In these the total ed has been estimated from 
uU fee » e other proportion 
I — » No. HL, ” 
K.—Mesoplodon floweri, Haast. 
L.—M. — Chatham Islands, vega Museum. Breadth computed from dis- 
s between articular surf 
11. Zirmius cavirRosTRIS, Cuvier. 
Epiodon chathamiensis, Hector ; Trans. N.Z. Inst., V., 164. 
Epiodon nove-zealandie, v. Haast; Trans. N.Z. Inst., IX., 430. 
Dr. von Haast has given an elaborate description of the second complete 
skeleton of this whale yet obtained, the first, which is in the museum at 
* Loc. cit., 446. 
aestibus SEMEL 
