LATERAL LINE SYSTEM OF CHIMERA COLLIEI 
355 
of figures ; but neither Garman nor Dean show any enlargements 
of the rostral canals of Callorhynchus, Rhinochimsera, or Har- 
riotta. 
Extending ventrad from the orbital canal, directly below the 
orbit, are two canals, the angular and the jugular. The jugular 
(figs. 1,3, j), which arises about two or three centimeters posterior 
to the angular, as it passes ventrad curves, for a considerable 
part of its length, towards the pectoral fin; as it passes to the 
under-side of the fish, however, it comes to lie in a transverse 
direction. Near the mid- ventral line, where the two jugulars 
meet, they form a slight curve whose convex side is towards the 
head (fig. 3, j). For a considerable distance across the ventral 
side of the head the jugular is not a continuous canal, but is 
broken up into a series of short sections, like dots and dashes 
(fig. 3, j). In some specimens these dashes are very distinct, in 
others they can scarcely be traced from side to side. The course 
of the jugular canal, as well as can be judged from Dean's and 
Garman's figures and Garman 's descriptions, seems to be about 
the same in all the Chimaeroids that have been studied, except 
that in Rhinochimaera and Harriotta, as seen in Garman's figures, 
the dashes of the two sides do not quite meet each other in the 
mid-ventral line. 
The angular canal (figs. 1, 3, 4, an) arises, as has been said, 
from the orbital, a short distance anterior to the jugular. The 
position of either the angular or the jugular may be said to be 
the line of division between the orbital and the suborbital. For 
one or two centimeters the angular extends ventrad with a slight 
curve cephalad; then it makes a sudden turn cephalad and pro- 
ceeds, in an almost horizontal direction, sloping slightly ventrad, 
towards the front of the snout where it unites with the suborbital. 
At the point where the angular turns suddenly towards the snout 
arises the oral canal, to be noted below. That part of the angular 
canal between the orbital and the oral is of the usual type, while 
the part between the oral and the subrostral has a series of wide 
spaces like those noted in connection with the rostral and subor- 
bital. Along the anterior border of the vertical part of the angular 
are five or six large gland openings; and along the upper side of 
