74 REPORT—1863. 
in the year 1845, in a yachting voyage to the west coast of Shetland; and he 
was enabled to make another addition to the list, in ZYrochus occidentalis 
(Mighels and Adams), Cerithiopsis metula (Lovén), and Aporrhais pes-carbonis 
(Brongniart?). This excursion occupied some time. Besides the last-men- 
tioned Mollusca, Forbes discovered many new species of Medusa and two new 
Echinoderms, In 1848 I again took my dredge to Lerwick, in order to 
complete a monograph on the British and Irish species of Odostomia for the 
Meeting of the Association held that year at Swansea. I found one more 
novelty in the way of Mollusca, viz. Cylichna conulus (8. Wood), which was 
then known only as a coralline-crag shell. My late friend, Mr. Barlee, went, 
at my suggestion, to Lerwick in 1857, and to the Whalsey or Outer Skerries, 
on the east coast of Shetland, in 1858, dredging for many weeks each year. 
I was by his means enabled to increase the list of indigenous Testacea by the 
goodly number of nine, viz. Pecten wratus (Gmelin), Arca nodulosa (Miiller), 
Poromya? subtrigona (Jeffreys), Skenea nitida (Jeffreys), Jeffreysia globularis 
(Jeffreys), Hulima stenostoma (Jeffreys), Odostomia minima (Jeffreys), and a 
shell belonging to a new genus allied to 7'richotropis, and which I provisionally 
named Recluzia aperta. A good yacht having been lent to me in 1861 bya 
relative, I revisited Shetland for the third time, being accompanied by my 
friends Waller and Norman. We took up our quarters at the Out-Skerries 
Lighthouse. In spite of storms and calms, we were tolerably successful; and 
I presented to the Association, at the Manchester Meeting in that year, a 
communication relative to the deep-sea dredging of Mollusca. Mr. Norman 
followed suit with regard to the Crustacea and Echinoderms. The Report 
for 1861 will testify to the amount of work done. Among the Mollusca were 
two quite new to science, viz. Aclis Walleri (Jeffreys) and A, septemradiatus 
(Jeffreys), and nine other species which had not before been found or noticed in 
our seas, viz. Leda pernula (Miiller), Newra rostrata (Chemnitz), Oleodora 
pyramidata (Eydoux and Souleyet), Dentalium abyssorum (Sars), Margarita 
maculata (Searles Wood), Cerithiopsis costulata (Miller), Plewrotoma nivale 
(Lovén), Fusus Islandicus (Chemnitz), and Cylichna alba (Brown). The 
Cithara is unusually interesting in a geological point of view. It is an un- 
described fossil of the upper miocene, and has not been discovered in any 
newer formation. I lately detected two specimens (one adult and the other 
young) in the extensive collection of M. F. Cailliaud at Nantes from the 
“faluns” of Touraine ; and he most obligingly presented them to me for the 
sake of comparison. I afterwards showed these specimens to the great 
paleontologist, Deshayes ; but he was unacquainted with the species. Even 
the animal of the genus to which it belongs (Cythara, Schumacher) was 
previously unknown to science. With respect to the Margarita I may 
remark that the recent shell is of a pure and delicate pearl-white, with 
an iridescent gloss, and so unlike in appearance to the small and dingy 
fossil specimens found in the Coralline Crag that I had at first no 
suspicion that they were the same species, and I proposed to give to the 
recent shell the name of elegantula. The name of maculata is derived 
from ferruginous blotches which disfigure some of the fossil specimens, 
However, I am now satisfied that the Shetland specimens do not differ 
specifically from those of the Crag, and I must relinquish the name of 
elegantula in favour of the name given by its first discoverer, although the 
latter is exceedingly inappropriate and likely to mislead. The animal, as well 
as the shell, are exquisitely beautiful objects. Many novelties were also 
discovered among the Nudibranchs, Crustacea, Echinoderms, and Hydroid 
Polypes, for which I must refer to the valuable communications of Mr. Alder 
