602 EEPQKT— 1880. ..,- 



which are also Atlantic or varieties of other species, on the authority of the 

 Marquis de Monterosato, the Marquis de Folia, Dr. Fisher, the Rev. Mr., Watson, 

 and myself. 



Brachiopoba. 

 Argiope cordata, Ri'sso. 

 Thecidium mediterraueum, Misso. 



CONCHTFERA. 



Pleuronectia Isevis, Jeffreys. A monstrositj' of Pecten similis. 



Mytilus minimus, Pvli. 



Nucula convexa, Ji =N. segeensis, Forbes ; young. 



Leda ohlonga, J. = L, micrometrica, Segiienza. 



subrotunda, J. =L. minima, Sey. 



Solenella cuneata, tT". (MaUetia). 



Venus cygnus, Lamarck = V. nux, Gmelin. 



PecchioUa insculpta, /. (Verticordia). 



Gastropoda. 



Emarginula adriatica, O. G. Costa, 



Trochus scahrosus, J. — T. genimulatus, Philippi. 



Fossarus costatus, Brocchi. 



Rissoa caribsea, D'Orbiyny. 



— — rudis, P/i. 



■ maderensis, J. 



Osecum chiereghinianum, Brusina — C. glabrum, Montagu ; variety. 

 Vermetus triquetra, Tiivona. 

 Scalaria Cantrainei, Weinhauff. 

 Odostomia polita, Biv. 



tricincta, J. 



fasciata, Forh. 



Eulinia microstoma, Brus. 



Jeffi'eysiana, Brus. 



Natica Dillwynii, Payraudeau. 



marmorata, H. Adams. 



Solarium pseudoperspectivum, Brc. 

 Xenophora mediterranea, Tiberi, 

 Cerithium costatum, Da Costa. 



■ elegans, De BlainviUe. 



Triton seguenzje, Aradas and Benoit = T. nodifer, Lam. ; var 



Lachesis Folinea;, {Delle Chiaje) Ph. 



Cassidaria echinophora, Linne ; probably C. tyrrhena, Chemnitz is a variety. 



Defrancia hystrix, De Cristofori and Jan. 



Pleurotoma pusilla, Scacchi = P. multilineolata, Deshayes ; var, 



Cyprjea physis, Brc. ? 



Utriculus striatulus, J. 



Akera fragilis, J. 



Diphyllidia lineata. Otto. 



pustulosa, Sc. 



Total, 41 species. 



This reduces the number of supposed exclusively Mediterranean species from 

 222 to 181 ; and it must be borne in mind that the Atlantic Nudibranchs and 

 Cephalopods have never been completely worked out. Philippi's list of Mediter- 

 ranean Nudibranchs and Verany's list of Mediterranean Cephalopods amoimt to 58 

 ^nt of the above residue of 181. When further researches by dredging have been 

 made in the North Atlantic, I believe the difference between the Mollusca in 

 that extensive ocean and in the Mediterranean will be still more diminished, if it 

 do not in time altogether disappear. 



