DUBLIN UNIVERSITY ZOOLOGICAL AND BOTANICAL ASSOCIATION. 201 



dance on the slopes of Mount Olivet, that overhung the town. The path 

 from the Salut through the woods, at the base of Mount Olivet, was lined 

 with a profusion of Wdhlenbergia hederacea, a delicate little campanula, 

 not uncommon in our Irish hogs, hut which here occurred on dry clayey 

 banks. 



The court-yard of the Thermal establishment supplied me with spe- 

 cimens of Adiantum capillus- Veneris, which I have noted as growing 

 at Pierrefitte, more than twelve miles distant in a direct line. 



M. Phillipe, the well-known and able botanist of Bagneres, informed 

 me that he had in vain sought for this fern in the neighbourhood of 

 Bagneres, and accounted for its presence in this singular locality from 

 the warm and moist exhalations of the springs, supplying an atmosphere 

 congenial to its growth, but of the manner in which the spores had been 

 conveyed he could give no satisfactory explanation. 



M. Phillipe is a zoologist and geologist as well as a botanist, and has 

 good collections in each department, specimens from which he disposes 

 of to naturalists at a very moderate price. I had from him excellent 

 series of Pyrenean mosses and lichens for our College Herbarium. 



The uncertainty of the weather and lateness of season determined us 

 to abandon our design of visiting Bagneres-de-Luchon and the eastern 

 Pyrenees, and to reserve these for some future opportunity. We, there- 

 fore, left Bagneres-de-Bigorre on the 9th of August, and, proceeding by 

 Pau and Dax, took the railway to Bourdeaux and Paris, visiting en route 

 the fine old towns of Angouleme and Blois, reaching London on the 16th, 

 and Cork on the 24th of August. 



Dr. Harvey read the following — 



SHORT DESCRIPTIONS OF SOME NEW BRITISH ALG^E, WITH TWO PLATES. 

 (TAB. XII. AND XIII.) 



1. Leathesia crispa. — Frond subglobose or irregularly tubercular, 

 small, olivaceous, firm, and solid; medullary threads very densely 

 crowded, empty, dichotomous, with very long articulations ; peripheric 

 ramelli club-shaped, incurved or arcuated, submoniliform ; the articula- 

 tions about as long as broad, unequally constricted at the nodes ; spores 

 pyriform. — Tab. XII. A. 



Growing on Chondrus crispus in the Clyde, at Cumbrae, April, May, 

 and June, 1853. (Mr. Roger Hennedy.) 



Pronds 1-4 lines in diameter, globose, at length irregularly shaped 

 and confluent, of a very firm and dense substance, always perfectly so- 

 lid. Mr. Hennedy, who watched the plant carefully for a period of 

 three months from its first discovery, remarks that he can always dis- 

 tinguish it from the young of L. tubenformis by its firm and solid charac- 

 ter, by merely applying a finger and thumb to the little frond. Under 

 the microscope it is readily known by its curled apical filaments, or pe- 

 ripheric ramelli, which are unequally constricted at the nodes, being 

 crenate along the outer edge of the filament, and even along the inner ; 



