118 Excerpta Zoologicas Metamorphoses of Intestinal Worms, 



tailed fully all the plants which were observed, with the view 

 of calling the attention of botanists to many hills of a similar 

 nature which occur in the Braemar district, and which I fear 

 have been overlooked. Much still remains to be done in that 

 part of Scotland, and I have no doubt that many of the plants 

 hitherto considered as confined to the Clova range will, on 

 careful examination, be detected on the Braemar hills. On 

 reaching the summit of Ben Aven we gathered Luzula arcu- 

 ata in considerable quantity. 



In all the alpine districts which we visited, we met with 

 numerous varieties of Hieracium alpinum, Halleri and Law- 

 soni. These require to be carefully studied, and I trust that 

 ere long Mr. Babington will give us the result of his exami- 

 nation. 



On leaving Braemar Mr. Babington and I proceeded to 

 Dingwall, with the view of botanizing on some of the Ross- 

 shire mountains. On Ben Wyvis we saw luxuriant specimens 

 of Arctostaphylos alpina, growing in a damp situation more 

 than 1000 feet below the summit. In the other districts of 

 Scotland in which I have picked this plant, I have generally 

 found it on the dry stony summits of the mountains. The 

 other plants found on Ben Wyvis are not of such importance 

 as to deserve notice. The mountain is not rich in alpine spe- 

 cies, a character which it appears to possess in common with 

 most of the other hills in Ross-shire. 



We returned to Glasgow by the Caledonian Canal and In- 

 verary, and picked Potamogeton plantagineus in several loca- 

 lities near Oban, and a variety of Hieracium prenanthoides, 

 without a ray on the shores of Loch Long near Arrochar. 



XXI. — Excerpta Zoologica : On Metamorphoses among In- 

 testinal Worms. Communicated by W. Francis, Ph. D., 

 A.L.S.* 



M. Miescher found Filaria piscium especially frequent in the follow- 

 ing fish exposed for sale in the Paris market : in Triglce Gurnardus, 

 Lyra, Cuculus, and lineata, in Trachinus Draco and Gadus Merlan- 

 gus. The Filarite were partly free in the ventral cavity ; some lie be- 

 neath the peritoneal coverings of the different intestines^ between the 

 layers of the mesentery beneath the peritoneum of the ventral walls, 



* The present notice, which was alluded to in the last Number of this 

 Journal, p. 48, is taken from Dr. Th. von Siebold's valuable report on the 

 investigations in Helminthology during 1840, and published in Wieg- 

 mann's ' Archiv,' parts 4 and 5 for 1841. It not only furnishes the results 

 of Miescher's interesting discoveries, but also draws attention to similar in- 

 vestigations by Leblond and Dr. Siebold. Miescher's paper is published in 

 the Reports of the Proceedings of the Naturalists' Society in Bale. 



