Till 
CONTENTS. 
Some Helps to the Study of Scoto-Celtic Philology. By the Hon. 
Lord Neaves, ....... 758 
Some Observations on the Dentition of the Narwhal ( Monodon 
monoceros). By Professor Turner, . . . . .759 
On the Occurrence of Ziphius cavirostris in the Shetland Seas, and a 
comparison of its Skull with that of Sowerby’s Whale ( Mesoplodon 
Soiverbyi). By Professor Turner, . . . . .760 
On the Maternal Sinus Vascular System of the Human Placenta. 
By Professor Turner, . . . - . . .760 
On Dimorphic Flowers of Cephaelis Ipecacuanha, the Tpecacuan Plant, 
By Professor Balfour, . . . . . .763 
On the Crinoids of the “ Porcupine” Deep-Sea Dredging Expedition. 
By Professor Wyville Thomson, . . . . .764 
Laboratory Notes. By Professor Tait— 
On Thermo-electricity: Circuits with more than one Neutral 
point. (With a Plate). ..... 773 
On a Method of Exhibiting the Sympathy of Pendulums, . 779 
On some Quaternion Integrals. Part II. By Professor Tait, . 784 
On the Currents produced by Contact of Wires of the same Metal at 
Different Temperatures. By W. Durham, Esq. Communicated by 
Professor Tait, . . . . . . .788 
Remarks od the Deep;Water Temperature of Lochs Lomond, Katrine, 
and Tay. By Alexander Buchan, A.M., . . . .791 
Donations to the Society, . . . . . .796 
Index, . . . ■ . . . . . .821 
