OF NORTHUMBERLAND AND DURHAM. 157 
4, F.-eractiis, Da Costa. 
Murex corneus, Mont. Test. Brit. 258. 
Fusus Islandicus, “ Martini,” King in Ann. Nat. Hist. xviii. 
246. 
In the coralline and deep-water zones, frequent. The variety 
from deep water is more ventricose than the common form, and 
has the epidermis thinner, smoother, and sometimes of a reddish 
colour. The shell figured by Captain Brown in his “Illustrations 
of the Recent Conchology of Great Britain,” t. 6, f 11, 12, found 
by Sir W. C. Trevelyan, Bart., at Seaton, appears to be an un- 
usually short specimen of this variety. 
Much confusion has arisen in the name of this species from 
the circumstance of Linneus having included more than one shell 
in his Murex corneus; but as it is now agreed that the name 
should belong to the Mediterranean shell (Pusus lignarius of 
Lamarck), and being of opinion that our species is not the /usus 
Islandicus of Chemnitz, to which it has lately been referred, we 
follow Professor Lovén in adopting Da Costa’s name, the earliest 
undisputed appellaticn. 
5. F. PROPINQUUS, 2. s. 
Shell fusiform, white, covered with a brown epidermis, striated 
spirally ; the strie rather variable, but generally deep and dis- 
tant on the upper whorls, more closely set on the lower, and 
often rising into ridges towards the base of the shell. Whorls 8, 
flattish, or very slightly convex, and a little tumid above at the 
suture ; they are broader in proportion to their height than in 
the last species, and consequently the spire is a little less pro- 
duced. The nucleus, forming the apex of the shell, consists of 
two or three very small whorls, the first very little raised, and 
only to be seen from above; the apex is rather slender, not 
mammillated, and generally stained of a ferruginous colour ; 
aperture oval, rather contracted, and ending in a short canal of 
moderate width, a little bent towards the left side ; outer lip 
thin ; pillar smooth, a little arched inwards in the centre, and 
produced in old shells into an obtuse rounded angle towards the 
entrance of the canal. Length 14 in., breadth $ in. 
