114 
Proceedings of the Royal Society 
which the web extends, and eleven closely set, and showing a 
tendency to biserial arrangement on the free extremities. There 
are no cirri, nor is there any trace of the formation of a hectocotylus. 
The Surface appears to have been quite smooth originally ; there 
is no sign of any cirri or warts. 
The Colour is a dull yellow, apparently due to preservation in 
picric acid, and the mantle and umbrella are thickly sprinkled 
with small brown chromatophores. 
Habitat. — Near the Kermadee Islands, South Pacific ; on the 
surface (Station 171). 1 specimen, sex'? 
2. On Energy in Vortex Motion. By Sir William Thomson. 
(a) Energy in Vibrations. 
(&) Unlimited augmentation of Energy of a simply continuous fluid 
mass in a space of given shape, by changes from and back to 
this shape. 
(c) Annulment of Energy under same conditions. 
( d ) Reduction of Energy to absolute minimum in a multiply continu- 
ous space of given shape. 
(e) Unlimited augmentation of Energy in a multiply continuous 
space. 
3. The Theory of Determinants in the Historical Order 
of its Development. Part I. Determinants in 
General (1693-1800). By Dr Thomas Muir. 
4. On Bipartite Functions. By Dr Thomas Muir. 
5. Note on Galois’ Theorem regarding the Continued Fraction 
Bepresentation of the Boots of an Equation. By Dr 
Thomas Muir. 
6. Letter from Professor Michie Smith on the Zodiacal Light, 
and on the Origin of Atmospheric Electricity. 
Madras Christian College ; 
Laboratory, 21 st January 1885. 
My Dear Professor Tait,— -I have just got back from an expedi- 
tion to the top of “Dodabettah” (over 8600 feet), where I have been 
trying to get the spectrum of the zodiacal light under more favour- 
able circumstances than are possible here. I cannot say that I have 
