Bei 
The Occurrence of isso’s Dolphin in the Shetland Seas. 195 
The following are some of the principal measurements of 
one of the adult crania :— 
Foot. Inches. 
Condylo-premaxillary length in straight line, : 1 12 
Length of beak, ; 0 10 
i superior maxilla, . . ‘ : 1 5+ 
a premaxilla, : : : 1 34 
Anterior border of foramen magnum over vertex to 
tip of beak, ) : 1 11} 
Anterior border of foramen magnum to upper border 
of occiput, 
Greatest breadth of skull, : : 
Breadth between middle of orbital borders of 
frontals, ‘ : : 
Length of mandible along outer surface, 
Greatest breadth of the beak, 
Height from basi-occipital to vertex, 
— 
Do oe 
bole 
2 
4 
8 
8 
oO © 
The skull showed considerable obliquity in the naso- 
maxillary region. The slope of the mesethmoid was directed 
upwards and to the left; the right nasal bone was larger 
than the left, and each nasal was apparently divided into 
two lateral halves by an intermediate suture. The upper 
end of the right nasal was to the left of the mesial plane, and 
the posterior end of the right premaxilla was separated from 
the right nasal by a very narrow portion of the superior 
maxilla, whilst on the left side a much broader part of the 
superior maxilla intervened between the right premaxilla 
and nasal. 
The stomach has been described both by M. Fischer? and 
Dr Murie,? and has been shown to resemble that of Globi- 
cephalus melas. My observations have led me to the same 
conclusion. It may suffice, therefore, if I state that it con- 
sisted of five compartments—a, a large cesophageal paunch 
lined by a prolongation of the cesophageal epithelium; 3, a 
large cardiac or true digestive chamber; ¢, a small compart- 
ment which communicated with 0 and d; d, a globular 
compartment about the size of a large orange; e, an 
elongated compartment with a pyloric valve, from which the 
dilated commencement of the duodenum arose, the latter of 
1 Annales des Sciences naturelles, viii., Zoologie, 1867. 
2 Journal of Anat. and Phys., Nov. 1870, vol. v. 
