30 Prof. J. C. Schiodte on the Tunnelling Coleopterous 



of this museum a specimen of P. perversa said to have been 

 brought from South Carolina ; but I should not like to lay much 

 stress upon this, as the localities given, in collections, for foreign 

 shells are too often, alas ! not to be depended on. 



I may add that my notes on these species were submitted to 

 Dr. Eduard von Martens, of Berlin ; and it is at his suggestion 

 they are published. 



In conclusion, I would suggest the following amended dia- 

 gnosis of the shells in question : — 



Pyrula carica (Lamarck). 



Shell pyriform, ventricose, tumid, rather thick, more or less 

 transversely striated ; whorls dextral, more or less depressedly 

 angled round the upper part, armed at the angle with large 

 flattened spines ; interior of the aperture striated or faintly 

 grooved; columella varying in colour from deep orange to 

 white; exterior of the shell white, variously streaked and 

 banded with reddish brown. 



Hab. South Carolina, West Indies ? 



Var. a. The Pyrula perversa of Lamarck. 



The shell the same as the last; but whorls sm/s/ra/; aperture 

 more or less distinctly grooved ; colour of the columella vary- 

 ing from pure white to deep yellow. 



Hah. West Indies, Gulf of Mexico, Florida, South Carolina ? 



Two other varieties might perhaps be added, namely : — 



Var. /9. Shell thin ; colours pale or uniform ; smooth within ; 

 dextral. 



Var. 7. The shell with large spines, with a rather short but very 



gibbous and swollen canal. 

 Hab. Guyana. A specimen in the Museum at Berlin (Dr. von 



Martens). 

 Clifton, near Bristol, June 10, 1867. 



VI. — On the Tunnelling Coleopterous Genera Bledius,Heterocerus, 

 Dyschirius, and their Danish Species. By Professor J. C. 

 Schiodte*. 



The connexion between these three genera is not of a systematic 

 character, for they belong to three widely different families ; 



* Translated from the Danish original in ' Naturhistorisk Tidsskrift,' 

 3 ser. vol. iv. p. 171- Copenhagen, 1866. 



