238 REPORT—1868. 
Trochus amabilis is another case, assuming that it originated from Margarita? 
maculata of Searles Wood.’ 
Professor Dickie has been good enough to report on some Diatoms from 
the insides of a quantity of Echinus Norvegicus, which were dredged at a depth 
of 78 fathoms about forty miles from the east coast of Shetland. He says 
they are chiefly Navicula didyma, Coscinodiscus eacentricus, C. minor, Acti- 
nocyel us undulatus, and Melosira sulcata, with fewer of M. nummuloides and 
Nitzschia angularis, all marine ; also a few freshwater Cocconema lanceolatum, 
Surirella minuta, and fragments of a Pinnularia. And he adds that long ago 
he recorded the occurrence of freshwater Diatomaceze mixed with marine 
species from the stomachs of Ascidiew taken in deep water off Aberdeen. The 
freshwater Diatoms must evidently have been carried by a stream into the sea, 
and transported by the tide to the place where they sunk to the bottem, and 
were swallowed by the indiscriminating Hchini and Ascidie. Diatoms inhabit 
the surface only of the water, and Globegerina and other Foraminifera not of 
a fixed or sessile nature have been observed by Major Owen and myself 
to float when alive within a few inches from the surface. Dr. Wallich found 
the microscopic organisms which he called coccospheres “ profusely in a living, 
or perhaps it would be more safe to say a recent, condition in material col- 
lected at the surface of the open seas of the tropics.” Coccospheres and free 
Foraminifera cover the bed of the Atlantic at enormous depths. The occur- 
rence, therefore, of such organisms on the floor of the ocean at such depths 
does not prove that they ever lived there. I should rather be inclined to 
believe that they dropped to the bottom of the sea when dead or after having 
passed through the stomachs of other animals which had fed on them. 
A few small fishes were caught in the dredge at depths of from 90 to 100 
fathoms. Dr. Giinther reports that they belong to the undermentioned spe- 
cies :—Callionymus maculatus (Bonap.), Gobius Jeffreysii (Giinth.), young, 
Cyclopterus lumpus (L.), young, Lepadogaster bimaculatus (Penn.), and 
Rhombus Norvegicus (Giinth.), young. He remarks that the last-named 
species is new to the British fauna, having been hitherto known from the 
coast of Norway only. 
Mr. Norman will report on the Crustacea, Tunicata, Polyzoa, Hydrozoa, 
Echinoderms, Actinozoa, and Sponges, Dr. M‘Intosh on the Annelids, and 
Mr. Waller on the Foraminifera. 
Mollusca inhabiting the Shetland Isles and the adjacent seas. (See Tables 
of distribution in ‘ British Conchology,’ vols. i.—iv.) 
: ae Remarks as to distribution 
Name of Species. = a and synonymy. 
ae 5 = 
A |n 
MARINE. 
BRACHIOPODA. 
Terebratula cranium, Miiller ....| — | — | Vigo (M‘Andrew). 
caput-serpentis, Linné| — | — 
+Terebratella § spitzbergensis, Da- 
VIASOM« i6:s.stdid SAH GS REE Oa eevers — Possibly fossil. 
+Rhynchonella psittacea, Z. ....| — Possibly fossil. 
Argiope lunifera, Philippi ...... — | — | Terebratula cistellula, 8. Wood. 
Crania anomala, Miiller ........ — | — | Anomia turbinata, Poli. 
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