MOLLUSCA. 
5ia 
species which are not British, and do not extend to the south of 
the Farders, are Natica affinis (Gmel.), Lepeta cceca (Mull.) , and 
the pelagic Clio pyramidata (Linne), but they belong to the 
shell-fauna of the British Crag. On the other hand, there are 
25 species which inhabit the Farders, hut neither Iceland nor 
Greenland — among them the genera Cyprcea, Mm'senia, Coch- 
lodesma, Tellinaj Psammohia, Solen, Pectunculus, Lucina, and 
several of the most common German species, as Trochus zizi- 
phinus, T. umbilicalis, Patella vulgatay Chiton marginatus, Venus 
striatula, Pecten opercularis. Dr. Mdrch gives an account of 
18 scientific men who have contributed, by personal researches 
or original descriptions, to the knowledge of the malacological 
fauna of the Farders, beginning with Olaus Worm, 1655. Ac- 
cording to the researches made by Prof. Steenstrup, in the 
summer of 1844, there may be distinguished three regions of 
depth, — first, the true littoral region, or that of Balanus and 
Fucus, exhibiting three' species of Littorina^ Patella vulgata, 
Purpura lapilluSj Chiton ruber y &c. ; secondly, the region of La- 
minaria y on which are found Lacuna vincta and pallidulai Mar- 
garita helicinay and Patella pelluciday but only rarely Nudi- 
branchs ; thirdly, the region of a depth of 15-25 fathoms ex- 
hibits principally some species of Chiton and small Patellida. 
Naturhist. Forenings Vidensk. Meddelels. pp. 69-110. 
Shetland Islands. Gwyn Jeffreys, in his fourth dredging report, raises 
the number of Shetland marine mollusca to 338 species j among these there 
are recorded for the first time as Shetlandic Terehratella spitzhergensis, 
Montacuta tumididuy Siphonodentalium lofoten^e, Cadtdus subfusiformis, Rissoa 
proxima, Odostomia clavulay and Utriculus glohosus J the claims of Rhyncho- 
nella psiUacea and Lcda pernula as being recent British are supported. Other 
rare species, previously dredged on the eastern or northern coast, were found 
this year on the western coast also. Natica catena has been dredged in from 
40-50 fathoms ; in the considerable depth of 170 fathoms (greater than any 
previously examined in the British seas) were dredged 54 species, 16 of 
which were living, the shells of the usual, and some even of a brighter and 
darker colour than in average examples from a few fathoms depth ( Venus 
ovata and Eulima hilincatd). Ann. & Mag. Nat. Hist. 1807, xx. pp. 247-264. 
Brittany, The more remarkable among the sea-shells of the department 
of Morbihan enumerated by Tasl 6 are the following : — Teredo malleolusy 
megotaray and hipinnatay Thracia puhescensy Mesodesma corneuniy Tellina ser- 
ratuy Cyprina islandicay Nucida tenuis y Terehratida caput serpentis and Me- 
gcrlia truncatuy Chiton cajetanusy Rissoa puncturay violaceUy liladnUy proximo y 
and vitreOy Adeorhis subcarinatus and striatusy Etdima intermedia, Adis 
ascaris, tmicay and supranitiday some species of Etdimclla, Chcmnitziay and 
Odostomiay Bidlcea catenuy scabray Fusus gracilis, Triton nodif&rus and cuta- 
ceusy Omda acuminatay and Cassis sulcosa, 
Belgium. The marine fauna of this kingdom contains, according to the 
list of F. DE Malzine, 56 species of Bivalves, no Brachiopod or Pteropod, 
only 40 Gastropods, and 2 Cephalopods. There may be mentioned os less 
common species, Tellina proxima (Brown), striata (Montagu), and similis 
