Haasr.— Notes on Mesoplodon floweri. 445 
The small enamelled portion rising on the anterior edge of the apex is 
not quite so large as in the Cape specimen. 
The lower jaw from the Chatham Islands is 1:75 inches shorter than 
that of the specimen under review, in which latter the mandibular tooth is 
also much longer, which may be regarded as an individual difference only. 
The following table of measurements will also supply further material 
for comparison :— 
Dimensions of the Skull. 
Fi in. 
Extreme length of cranium wc B DD 
Length of rostrum from the apex of un pre- facilis to a 
line drawn between the ante-orbital notches .. 2 848 
Greatest height from top of nasals to lower border of 
pterygoids .. cod L 
Greatest breadth across pat: orbital process of koldi. 1 822 
Breadth of base of rostrum between bottom of ante- 
orbital notches is s 4.70. 590: 
Breadth of rostrum in the undi es "d ^ D. X 
Greatest width of the two nares ... T s aer 0- BAB 
Height of crest above occipital foramen .. ker OO 275 
Distance from point of rostrum to seek over blowere i in 
a straight line exe ies AUN ue i" » 48 
Mandible. 
Length of ramus ... bee ue sa a 4. 2 1075 
» , symphysis iia a us 0. BOS 
Vertical height of ramus at douai process ... ioc G E 
Distance from the condyle to the hinder edge of the base 
of the mandibular tooth .. 1 958 
Breadth of exposed part of np betas tooth sini upper 
margin of ramus  . 0 451 
Length of mandibular tooth Cup pode leor 
edge from upper margin of ramus to crown wd. My 
Hyoid Bones. 
The basihyal and thyrohyals are united into one bone; the two latter 
are each 4:5 inches long and 2:1 inches broad at their junction with the 
basihyal. The anterior edge of this bone is formed by two processes 
advancing considerably beyond its general outline, and being separated in 
the centre by a deep notch, in which respect the bone resembles that of 
Epiodon nove zealandia. 
The two posterior points of the thyrohyals stand 7-2 inches apart. The 
stylohyals are 7:5 inches long ; they possess a distinct head for their articu- 
