1888.] 
Dr Gunther on Deep- Water Fishes. 
207 
Notidanus griseus. Grey Shark. 
I take this opportunity of reporting the regular occurrence of this 
shark in British waters. The specimens hitherto known from the 
British seas were few in number, and taken on the south coast, and 
therefore this species was considered to be an accidental visitor from 
the Mediterranean and neighbouring parts of the Atlantic, where it 
is not uncommon. However, it appears to be well known to the 
fishermen who frequent the banks between the Orkneys and Shet- 
land ; and from this locahty Mr William Cowan obtained two adult 
specimens last summer, one of which is now in the British Museum. 
Acanthias vulgaris. Spiny Dog. 
One adult female, 26 inches long, with large ova in the oviduct, 
and a young specimen, 10|- inches long, were obtained in Kilbrennan 
Sound, 26 fathoms. December. 
One immature male in Upper Loch Fyne, 38 fathoms. January. 
Pristiurus melanostomus. Black-Mouthed Dog. 
Two adult males in Upper Loch Fyne, 37 fathoms. January. 
Coitus lilljehorgii. Norway Bullhead. 
(PI. IV. fig. B.) 
Coitus lilljehorgii^ Collett, Norg. Fish, p. 25, pi. i, figs. 4-5 ; 
Llitken, Vid. Medd. Foren., Kjobenk, 1876, p. 376; Lilljeb., 
. Sver. Fish, i. p. 158. 
D. 8|11-12. A. (6) 8-9. P. 15-16. V. 3. C. 13-14. 
Lateral line protected by bony plates ; the back above the lateral 
line and the upper side of the head with numerous minute ten- 
tacles j interorbital space deeply concave, narrow, only half as wide 
as the orbit ; upper part of the snout with two short spines ; 
parietal region with two subparallel ridges, made uneven by two 
pairs of projecting tubercles ; the ridges include a quadrangular 
space, which is half as long again as it is broad. The hind margin 
of the praeoperculum is armed with four spines, two of which are at 
the angle, the third is in the middle of the hind margin of the 
bone, and the fourth at its lower extremity ; these spines are very 
short and obtuse, with the exception of the upper, which is sharply 
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