138 
fully formed eggs enclosed within their cases, ready for extrusion, 
were taken from the bodies of females. I was thus able to identify 
ege-cases taken in situ among the weed at Station 30 in 35 fathoms. 
Apart from this, however, the young shark previously mentioned 
escaped from the egg the moment it was immersed in the preservative, 
and swam about most actively for a long time. 
The egg-case, which has not before been described, is long and 
narrow in shape, strongly compressed above, where its margin is 
straight and very wide, about 1:3 in the greatest width, which occurs 
near the second third of the length; the lower end is much more 
contracted, the angles bent inwards. Hach of the four angles is 
furnished with long tendrils which are twisted among seaweed, Xe. 
The lateral edges of the egg-case are conspicuously flattened, the 
thickness of the edge being about 3mm. When viewed in the hand 
the efferent slits are on the left side, one in the upper and the other 
in the lower third. On turning the egg-case round, a similar aspect 
is, of course, presented. 
The cases—in all instances two in number—taken from the ovi- 
ducts of the female were of very pale creamy-white colour, with yellow 
tendrils; these latter are formed quite straight in the shell-gland, 
but become twisted by being forced into a narrow space as produced. 
The deposited eggs are of darker hue, but are much lighter in colour 
than those I have seen of other members of the family, or of the 
Rajide. The egg-case is illustrated on Plate XXJ, fig 1. 
The egg-cases vary in size: four measured yield the following 
dimensions :— 
A (a.) | (6.) (c.) | (d.) 
mm. mm. |; mm. | mm. 
Length of body (median) te ve | LOT NS Bl lel 2 eas 
Width of body 2h +3 nosh 4p) 40 oP aS iT eae 
Thickness of body .. ne Sulipeeee Gli a2Ord Po kee | 26 
Width of upper (exit) end... cha (OEE, 31 33. | 33 
Three species of Cephaloscyllium are known, namely :— 
C. laticeps Duméril, 1853 (the type); Australia, Tasmania, 
and New Zealand. 
C. ventriosum Garman, 1880; American Pacific Coast, Cali- 
fornia to Chili. 
C. umbratile Jordan and Fowler, 1903 ; Japan. 
Mr. C. Tate Regan* regards C. uter Jordan and Gilbert as a synonym 
of C. ventriosum, and places all species in the genus Scyliorhinus. 
* Regan, Ann. Mag. Nat. Hist. (8), i, 1908, p. 458. 
