CONTENTS. iii 



Page 

 Stevenson, Esq., Civil Engineer. Com- 

 municated by the Author, . .83 

 XIV. On the Sexes, Organs of Reproduction, and 

 Mode of Development, of the Cirripeds. 

 Account of the Maidre of the Fishermen, 

 and Descriptions of some New Species 

 Crustaceans. By Henry D. S. Goodsir, 

 Esq. Communicated by the Author. With 

 three Plates. No. V. . . .88 

 Sect. I. — On the Male of the Balanus, . . 88 

 II. — On the Larva of Balanus Balanoides, . 97 

 III. — On the Larva of Balanus Tintinnabulum, 99 

 IV. — On the Maidre of the Fishermen, . 102 



XV. On a new kind of Phosphorescence observed 

 among certain Annelides and Ophiuridse. 

 By M. A. De QUATREFAGES, . . 104 



XVI. On some Experiments made by a Commission 

 of the Royal Institute of the Pays Bas, with 

 a view of verifying th j property ascribed 

 to Oil of calming the Waves of the Sea, 1 12 



XVII. 1. The PermJf)^ System of Rocks. 2. Theory 

 of the Origin of Coal. 3. Lines of Ancient 

 Sea Levels. 4. On Mastodontoid and Me- 

 gatherioid Animals. 5. The Chief Aim of 

 the Geological Society of London. By 

 R. I. MuRCHisoN, Esq., President of the 

 Geological Society, &c., &c., . .115 



XVIII. Notices of Earthquake-Shocks felt in Great 

 Britain, and especially in Scotland, with 

 inferences suggested by these notices as to 

 the causes of the Shocks. By David Milne, 

 Esq., F.R.S.E., M.W.S., F.G.S., &c. Com- 

 municated by the Author. (Continued from 

 Vol. XXXIV. page 106), . . .137 



XIX. Experiments on the explosive force of Oxygen 

 ^\^ and Hydrogen Gases. By James John- 

 ston, Esq. Communicated by the Author, 160 

 XX. Some considerations regarding the compara- 



