234 REPORT—1868. 
pieces. Its extraordinary size (considerably more than an inch in length) 
and the depth (110 fathoms) at which it was dredged deserve notice. 
Being in the south of Europe last winter I had an opportunity of examin- 
ing Mediterranean and Adriatic shells; and the result greatly surprised as 
well as interested me. The dredgings of Capt. Acton (the Commandant of the 
Italian navy) in the Gulf of Naples, and the extensive collections of Dr. Tiberi 
at Portici, General Stefanis at Naples, Herr Weinkauf from Algeria, and 
of Dr. Brusina at Zara, especially yielded a vast quantity of new material 
for a comparison of the marine testacea of the north and south of Europe. 
Many of the species having been described (some insufficiently) under dif- 
ferent names, the difficulty of identification is considerable; but there is no 
doubt that a remarkable concordance exists, and to a great extent, between 
the mollusca which inhabit the deeper parts of the Atlantic and Mediterranean 
seas from 62° to 36° N. lat. The littoral kinds differ much more—a cir- 
cumstance which may have been occasioned by climatal conditions. To ex- 
emplify the former proposition I subjoin a list of 76 species, usually considered 
northern, which are common to the North Sea and the Mediterranean, with 
their principal synonyms. 
Names of Species. Synonyms. 
Terebratula caput-serpentis, Linné. 
Argiope lunifera, Philippi ........ Terebratula cistellula, Searles Wood. 
Crania anomala, Miiller .......... Anomia turbinata, Pol?. 
Pecten septemradiatus, Mill. ...... Ostrea inflexa and O. clavata, Poli. 
Plavatus,'Gmelin 622% ove teeta P. Bruei, Payraudeau. 
Ps Destey Bion . 5.04. se adaete ts P. furtivus, Lovén. 
P. striatus, Mill. 
DP CH OS ayMs (8207-28 510 jay0 bco)0 vin ese P. imbrifer, Lov. 
P, vitreus, Chemnitz. .icsceccceees P. Gemellarii-filu, Biondi. 
PSION) GSE Gi seed erste vaio «s,s (aysi% P. pygmeeus, von Miinster. 
Tima Sarsiiy-Lov. ose sens eue sss Perhaps L. crassa, Forbes. 
L. elliptica, Jeffreys. 
L. subauriculata, Montagu. 
IPinng TUB} TAO Ak Maat ..... P. pectinata of some authors, not 
Mytilus phaseolinus, Ph. of Linné. 
Modiolaria discors, Z. 
Nucula nitida, G. B. Sowerby. 
IN, Ons Oh oe ae he Nts eR N. decipiens, Ph.; N. egeensis, orb. 
Leda pygmeea, v. Miinst. 
ATCA OplGua;? de. shh u es | hee A. Korenii, Danielssen. 
A. nodulosa, Mil, i.e edie ed A. scabra, Poli; A. aspera, Ph. 
Lepton nitidum, Turton. 
Montacuta ferruginosa, Mont. 
Lucina borealis, Z. 
Axinus Croulinensis, Jeffr. 
Cyamium minutum, Fabricius. 
Cardium minimum, Ph. .......... C. suecicum, Lov. 
Astarte sulcata, Da Costa ........ Tellina fusca, Poli. 
Lucinopsis undata, Pennant ...... Venus incompta, Ph. 
Tellina/balthien, alive sai. iit sities T. rubiginosa, Poli. 
T. pusilla, Ph. 
Scrobicularia nitida, Miill. ........ Syndesmya intermedia, Thompson. 
Lyons Norvegica,, Chr wast. 8 bic Pandorina coruscans, Scacchi. 
Thracia convexa, W. Wood........ T. yentricosa, Ph. 
Nevera rostrata, Spengler .......... N. attenuata, Ford. 
Xylophaga dorsalis, Trt. 
Siphonodentalium Lofotense, Sars. 
S. quinquangulare, Forb.........05 Dentalium variabile, Costa (Faun. 
Nap.), not of Deshayes ; 5. penta- 
gonum, Sars, 
™ o- aa 
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