190 SUPPLEMENT. 



Yol. III. p. 3. SOLECTJRTTJS CANDIDA. F. Boulder-clay, 

 Caithness (Peach) ! ; Monte Mario (Conti and Rigacci) ! ; Pa- 

 lermo (Aradas) ! ; Ehodes (Mus. J. d. PL) ! When this mol- 

 lusk is laid on its back, the valves are fully expanded, and it 

 is kept in its place by a pair of thread-like muscles, which 

 cross each other as if it were tied in that way. 

 P. 4, 1. 6 from bottom, dele " 1." 

 p. 6. g. ANTIQTIATUS. Psammobia antiqua, Risso. 

 P. 10. CARATISOLEN LEGTJMEN. Mersey estuary (Colling- 

 wood). F. Vesuvius (Guiscardi). 



P. 14. SOLEET PELLTJCIDTJS. F. Not Coralline Crag ; Monte 

 Mario (Conti) ! E. Bay of Biscay (Beltremieux and others)! ; 

 Naples (Acton) ! 



P. 16. S. ENSIS. F. N.W. Germany (Philippi)'; Maine 

 (Packard). E. Norway, from Finmark southwards, shore 

 10 f. (Sars). 



P. 18. S. SILIQUA. F. Norway and Italy. E. Norway, 

 from Bergen southwards (Sars). Ensis magnus, Schumacher. 

 P. 23. PANDORA. Dr. Morch informs me that Hvass was 

 not a German but a Danish justiciary, and that he was for 

 many years secretary to the Danish Embassy at Paris, when 

 Bruguiere, Lamarck, and Schumacher (at that time medical 

 students) assembled every week at his house at Auteuil. 



P. 24. P. noEQurvALVis, var. obtusa or Pinna. F. Monte 

 Mario (Rigacci). 



P. 25, 1. 7 from bottom, for " 10 " r. " 100 ". 

 p. 29. LTONSIA NORVEGICA. E. N.~W. America (P. Car- 

 penter) ; not Sea of Okhotsk, Middendorff's species being L. 

 arenosa. 



p. 33. THRACIA. Described by De Blainville in 1825. 

 P. 34, 1. 16 from top, for " Odoncincta " r. Odoncineta". 



P. 34. T. PR^TENUIS. 



BODY clear white : mantle pouting at its edges, which are 

 plain : tubes short ; branchial tube forming a wide slit, and 

 nearly sessile ; excretal tube (which is only now and then 

 protruded) longer and conical : foot large, lancet-shaped. 



F. Monte Mario (Conti and Rigacci) ! ; Rhodes (Mus. J. d. 

 PI.) ! E. Algeria (Weinkauff) ! 



