living Specimen of Siren lacertina. 355 



P. S. Since Uiis paper was read to the Wcmerian Society, I 

 have seen, in Silliman's American Journal of Science, Septem- 

 ber 1827, p. 70. an additional notice regarding the siren by Mr 

 Barnes ; in which he says, " Captain Le Conte has dissected a 

 large siren alive^ and has actually seen the expansion and con- 

 traction of the lungs in the act of respiration, just as in the frogs 

 and tortoises. They are true lungs^ and not merely air sacks, 

 and their connection with the heart and the arteries was distinct- 

 ly observed.*" 



A Tour to tlie Smith of France and the Pyrenees in the year 

 1825. By G. A. Walker ARNoTT,Esq. F.R.S.E. F.L.S. 

 M. W. S. &c. (Continued from last Number, p. 139.) 



\JN the 21st June, having, with much regret, seen our two 

 friends MM. Requicn and Audibert set off in the diligence for 

 Perpignan, we ourselves also left I*rades, and ascended the Couf- 

 flent towards Mont Louis, On our route we again passed the 

 Traucadc d'Ambouilla, and though we did not find it conve- 

 nient to leave the road, we nevertheless observed there Tortula 

 cfUoronotos, probably the identical station from whence Bridel 

 procured his specimens when he first dcscrilxxl the species; and 

 though small specimens have since been found in TencrifTe, and 

 published by Dr Hooker as Tortula vicmbranifolia^ and though, 

 as I think I have already mentioned, I have found it not un- 

 common in the olive district of the south of France *, this loca- 

 lity was yet very interesting. In its neighbourhootl also, we 

 saw Buffania perennis, Galium glaucuniy and Jlyssum halimi- 

 fbliuju, all of which, however, we had observed on other |)arts 

 of the Traucatle a few days before. Passing through Ville- 

 franche, wc saw in profusion Sarcocapnos cnncaphylhy on ele- 

 gant plant, closely allied to Fnmaria : this occurs both on llie 

 church walls and on the wall of the town, outside of the south 

 gate. We now crossed the Teta, and proceeded up the western 



• It has also been found in Switzerland, and is the T. mmm fU^ var. 

 noia-, ot* somQ of the Swiss collectors ; and it even exiuLs in Beauvois* hortiii- 

 rium from the neighbouriioiKl t)!' Paris, under the name of Torhtia canestmt, 

 P.B. 



..t 



