1886.] NEW PEDICULATE FISH. 139 
millim 
Breadth of the head across the jaws .................. 16 
a fe across the base of the orbital spine .. 10 
Length of the body to the commencement of the second 
UTC Seer Nr es ee Oneal one einen aes 26 
abe dine of. the second dorsal + ...).0) <<. )sie's a, see die, vive « O 
Depth of the root of the tail), 2.0% 0< 4 osu0s nis bee he Oe 
PUREED OES ORE fio fac ciehic, ‘as finds ands re detente sda ve 2°5 
Length of the cephalic tentacle (first dorsal)........ ... 9 
Length of the guttural tentacle ...............-.. 0005 23 
Renetn othe! Sandal fie.) 251. poghi winters alhiares al4O 
Length of the pectorals (with the pseudobrachium) .. .... 5 
Length from the snout to the pectorals (to the root of pseudo- 
DCRG eh dete etey Fs tndrstais 4 b.<45. oxiumssubi tev heaanen dG 
The structure of the body in its natural state can hardly be 
correctly described from this specimen, in which the whole of the 
belly exhibits an abnormal distension in consequence of the fish 
having swallowed a Scopeloid fish, the total length of which is one 
half longer than itself. 
The head is very large, with an enormous mouth and long teeth. 
The body itself is short and slender, compressed, and with the heavy 
dependent abdominal cavity, of which the hindermost part extends 
far beyond the end of the vertebral column. 
The greatest depth of the body is at the back of the head, and is 
precisely the same as the length of the head. The body itself is 
apparently much lower, and the root of the tail narrow and low. 
A thick cephalic spine is to be found on the snout; and under 
the throat a long tentacle divided at the end, which undoubtedly is 
phosphorescent, as well as the end of the cephalic spine. 
The gill-openings are so narrow that they can only be distinguished 
with difficulty ; their openings are not much larger than the head 
of a pin. 
Lhe head.—Its appearance when viewed from the front is nearly 
tetrahedral, somewhat compressed, and broadest downwards. Its 
greatest width is across the angle of the mouth, and is about equal 
to the length of the intermaxillary bones. The upper profile of 
the head exhibits a somewhat projecting and slightly outwardly 
inclined spine above each eye. The breadth of the head across the 
base of these spines (which form the upper corners of the square 
when the head is seen from the front) is one third less than the breadth 
across the angles of the mouth (or the lower corners of the square). 
The forehead in front of the orbital spines is concave, with a deep 
furrow leading to the end of the snout, bounded on each side by a 
ridge, on which also the orbital spines are projecting ; the concavity 
is somewhat broader downwards than it is above. 
There are altogether three spines on each side of the head. One 
orbital spine is directed upwards and slightly forwards. One spine 
at the back of the operculum is directed backwards ; also a small 
spine at the back of the lower jaw sloping inwards and downwards ; 
10* 
