298 Mr. J. Gwyn Jeffreys on Dredging 
This genus has many characters in common with the genus 
Batrachoseps ; but it differs in the tail (which is twice as long 
as the body and head) being cylindrical and of the same dia- 
meter and subannulated appearance as the body and head, 
giving the whole animal the appearance of a Cecilia or worm. 
Ophiobatrachus vermicularis. 
Black. Length of the body and head 24 inches, of the tail 
41 inches. 
Hab. Costa Rica (Osbert Salvin, Esq.). B.M. 
XXX VII.—Last Report on Dredging among the Shetland Isles. 
By J. Gwyn JEFrreys, F.R.S.* 
THIS was my seventh expedition to the northern extremity of 
our seas, and occupied the whole of the summer. It was not so 
successful as those in some previous years, owing to the stormy 
state of the weather. While my friends in England, Wales, 
Ireland, and Scotland were enjoying calm sunshine, our 
climate was exactly the reverse; and the persevering course 
of the wind (from north-west to south-west) prevented our 
doing much at sea. The North Sea is notoriously subject to 
broken weather, this being the point where the warm air in- 
duced by the Gulf Stream and westerly winds meets the cold 
air brought down by the arctic current. The fauna of the 
Shetland waters, however, is by no means exhausted. Every 
expedition has produced novelties, not only in the Mollusca, 
but in all other departments of marine zoology. 
On the present occasion I obtained, at a depth of 120 
fathoms, a living specimen and a larger dead one of a fine 
species of Pleurotoma, P. carinata of Bivona. It was origi- 
nally described as a Calabrian fossil; and Searles Wood records 
a single specimen having been found in the Coralline and 
another in the Red Crag. Professor Sars and Mr. M‘Andrew 
dredged a few specimens off the coasts of Norway; and the 
former gave some interesting particulars of the animal, which 
I have been able to confirm by my own observation. Although 
allied to P. nivalis, and found in the same locality, it has dis- 
tinct eyes placed on rather prominent stalks or ommatophores, 
whereas P. nivalis has no eyes nor any trace of eye-stalks. 
On this account Sars proposed the generic name Typhloman- 
gelia for the latter species; but it must be borne in mind that 
Eulima stenostoma is also eyeless, and yet is closely related to 
* Communicated by the Author, having been read at the Norwich 
Meeting of the British Association, August 20, 1868. 
