Miscellaneous. 77 



these eggs can be preserved during more than two months without 

 losing the power of development. If this fact be confirmed, we shall 

 possess the means of procuring species living in distant parts of the 

 globe and acclimatizing them in regions which they have never yet 

 inhabited. This result, obtained by MM. Berthot and Detzem, is 

 evidently of great importance ; the following are the means adopted 

 by these gentlemen. 



Eggs of salmon artificially fecundated were placed in a deal box in 

 layers alternating with damp sand. The box was then placed, /or 

 two months, in a cold room, the temperature of which, however, was 

 sufficiently high to preserve them from freezing. At the expiration 

 of this time the eggs were shrivelled, and before taking them out of 

 the box they were placed in water so that they might become 

 moistened through the sand with which they were covered ; for when 

 this precaution is neglected, they perish. 



Some of these eggs were sent to me by MM. Berthot and Detzem. 

 I placed them in my apparatus, where they have since hatched. The 

 experiment has therefore succeeded. — Comptes Rendus, April 5, 

 1852, p. 507. 



POSTSCRIPT TO MR. CLARk's PAPER ON RARE BRITISH MOLLUSCA 

 AT PAGE 22. 



June 23. — The Chemnitzia I mentioned yesterday turned out to 

 be the Chem. obliqua, with a perfectly smooth shell ; and after 1 had 

 despatched my postscript note I met with the Chem. decorata, an 

 animal of more modest pretensions, having the basal volution of the 

 shell finely and superficially striated. This discovery settles the di- 

 stinctness of the two, which I doubted, having stated in vol. vii. 

 p. 394 of the N. S. of the * Annals,' that the C. decorata is the 

 C. obliqua : I make this admission with the reservation that my pre- 

 sent shell is the obliqua, if such a species is in esse. And this morn- 

 ing I captured the rare Chem. insculpta alive. I have notes of the 

 three animals of this peculiar little section of the Chemnitzice. 



IRISH MOLLUSCA. 



To the Editors of the Annals of Natural History. 



Windsor Lodge, Monkstown, co. Dublin, 

 May 22, 1852. 



Gentlemen, — The following MoUusca have been obtained by me 

 off the Dublin coast, some of which are new to that locality : will you 

 please at your earliest convenience to publish their occurrence ? 



Teredo megotara, Hanley. Drift wood, Killiney Bay. 



Xylophaga dorsalis, Turton. Some very fine live specimens were 

 trawled off the Skerrie Islands. 



Sphcenia Binghami, Turton. In the thick valves of Ostrea edulis : 

 dredged in Dalkey Sound, 14 fathoms. 



Thracia villosiuscula, Macgillivray. Dredged in about 14 fathoms, 

 Dalkey Sound. 



T. convexa, Wood. Trawled off Skerries. 



Solecurtus coarctatus, Gmelin. Same locality as the last. 



