234 ; ; ;'. \ / : 



pieces. Its, eJ;r^*<^ri#F eize; (considerably more than an inch in length) 

 and the Jeg^^|](1^:fit^oiti,i3).at.VMclr"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 Oapt. 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 diifer 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, Linne. 



Argiope lunifera, Philippi . Terebratula cistellula, Searles Wood. 



Crania anomala, Mutter Anomia tmbinata, Poli. 



Pecten septemradiatus, Mull. Ostrea inflexa and O. clavata, Poli. 



P. aratus, Gmelin P. Bruei, Payraudeau. 



P. Testae, Bivona P. furtivus, Loven. 



P. striatus, Mutt. 



P. Hoskynsi, Forbes P. imbrifer, Lov. 



P. vitreus, Chemnitz P. Gemellarii-filii, Biondi. 



P. similis, Laskey P. pygmseus, von Mimster. 



Lima Sarsii, Lov Perhaps L. crassa, Forbes. 



L. elliptica, Jeffreys. 



L. subauriculata, Montagu. 



Pinna rudis, L P. pectinata of some authors, not 



Mytilus phaseolinus, Ph. of Linne. 



Modiolaria discors, L. 

 Nucula nitida, G. B. Sowerby. 



N. tenuis, Mont N. decipiens, Ph. ; N. segeensis, Forb. 



Leda pygmaea, v. Miinst. 



Area obliqua, Ph A. Korenii, Danielssen. 



A. nodulosa, Mull. A. scabra, Poli; A. aspera, Ph. 



Lepton nitidum, Turton. 

 Montacuta ferruginosa, Mont. 

 Lucina borealis, L. 

 Axinus Croulinensis, Jt'ffr. 

 Cyamium minutum, Fabricius. 



Cardium minimum, Ph C. suecicum, Lov. 



Astarte sulcata, Da Costa Tellina fusca, Poll. 



Lucinopsis undata, Pennant Venus incompta, Ph. 



Tellina balthica, L T. rubiginosa. Poli. 



T. pusilla, Ph. 



Scrobicularia nitida, Mull. Syndesmya intermedia, Thompson. 



Lvonsia Norvegica, Ch Pandorina coruscans, Scacchi. 



Thracia convexa, W. Wood T. ventricosa, Ph. 



Neaera rostrata, Spenyler N. attenuata, Forb. 



Xylophaga dorsalis, Turt. 



Siphonodentalium Lofotense, Sars. 



S. qiiinquangulare, Forb Dentalium variabile, Costa (Faun. 



Nap.), not of Deshayes ; S. penta- 



gonum, Sars. 



