156 C. E. Burroy.—Physical Observations of Mars. 
as I fancy, so superior in brightness to the supposed continents as terrestrial clouds 
would probably appear under similar conditions. In my notes I have more than 
once remarked that such a temporary veil was not brighter, and, in one instance at 
least, was fainter, than the adjacent continent, nearly of the same tint of orange, and 
many shades fainter than the ‘snow spots. The extremely dark spot named 
Terby Sea by Mr. Green is shown for the first time in the present series, as well as 
its minute predecessor in rotation to which Professor Schiaparelli’s name has been 
given by the same astronomer. The Terby Sea is almost, if not completely, put 
in connexion with De la Rue Ocean by a narrow dusky stripe.* The long dusky 
streak connecting Christie Bay and the North Polar regions reappears here. (See 
under No. 3). An extensive and ill-defined luminosity overspreads the marking 
called Jacob Land, as in No. 3 drawing. Very little detail was seen in the 
Antarctic Region. Eight-inch reflector, used with power 220, triple achromatic. 
No. 7. Longitude—93°. 1879, Nov. 22. 9" 39" to10" 1" G.M.T. Justifies the 
remarks made on the form of Christie Bay when describing No. 6. Schiaparelli 
Lake appeared more like a very short streak than a nearly circular spot. (N.B.—The 
definition was not at its best at this time.) The Terby Sea presented itself under 
a rudely rhomboidal form, not as an oval; which last shape it took when vision 
was not at its best and steadiest. It was estimated to be on the diameter passing 
through the northern snow spot and the centre of the disk at 10” 0™ G.M.T. 
Instrument : 8 in. reflector, usually with power 270. 
The system of interlacing and interfused dusky streaks on the northern side of 
the Terby Sea is curious, but does not appear to be new. See Kaiser's work. No 
‘snow’ could be detected with certainty at or near to the southern limb. 
Bessel Lake (Green) was not visible, though the bay to the southt was very 
distinct. 
Neither could Lagrange Peninsula be made out; a failure which was repeated 
whenever this region was well placed for close scrutiny. 
No. 8. Longitude=103°. 1879, Dec. 24. 5" 40™ G.M.T. 
This is the first of a set of three sketches obtained, on the date above given, 
all of which present anomalous features by no means easy to account for. The 
Terby Sea appears as a dark elongated spot with a prolongation extending in a 
S.W. direction, while to the N.E. of the dark spot a distinct bay is represented in 
the drawing, which seems to include the Terby Sea with its appendages. 
The explanation of these anomalies which appears at present to be the most 
probable one, is, that the streaks of shade on the northern and eastern sides 
of the Terby Sea were well defined at their outer edges, but not equally so on the 
side next the De la Rue Sea. If, moreover, there was a network of faint lines ~ 
within the area thus enclosed, similar to that detected on Nov. 22, it would, at 
* Previously discovered by Schiaparelli (1877). + This bay has been named Funchal Bay. See next page. 
