380 ~— Prof. J. C. Schiddte 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 sinistral; aperture 
more or less distinctly grooved ; colour of the columella vary- 
ing from pure white to deep yellow. 
Hab. West Indies, Gulf of Mexico, Florida, South Carolina ? 
Two other varieties might perhaps be added, namely :— 
Var. 8. Shell thin; colours pale or uniform; smooth within ; 
dextral. 
Var. y. 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. 
ScH16pTE*, — 3 
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. 
