124 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 
yellowish white Holothurians, which it is almost impossible to dis- 
tinguish from coral sand, and a species of Calappa, of which the mark- 
ings on the carapace can scarcely be distinguished from the mottled 
yellow coral sand in which they are partially buried. 
The coloring of the coral masses and patches found on the east face 
of Turtle Reef is most brilliant. Heliopora, huge Aleyonaria of many 
tints, the pinkish violet Madrepores, large clusters of brown Millepora and 
Pocillopora, masses of variegated sponges, the brilliantly colored gills of 
the huge Tridacnas, and the disks of numerous Actini give to the coral 
patches a brillianey of color which I have not seen on tho most splen- 
didly colored of the West Indian coral reefs. 
The preponderance of sponges and Alcyonarians, in place of Gor- 
gonians, is one of the most striking characteristics of the Great Barrier 
Reef of Australia. 
On Dunk Island beach, we found the Balanoglossus described by 
Hill in Vol X., Trans. Lin. Soc. of N. 8. W., November, 1894. 
І may mention here the peculiar patehwork formed by the tracks of 
a crab over the upper part of the coral sand beach, to the north of the 
northern breakwater at Townsville. А space fully ninety by twenty 
feet was completely carpeted with a diagonal pattern of lines of pellets 
thrown out of the burrows, which gave it very much the appearance 
of the diagonal tracery so characteristic of Arabic designs, only quite 
irregular, of course. Unfortunately, the photograph taken of this net- 
work of tracks was imperfect. 
Jack and Etheridge, in their Geology and Paleontology of Queensland 
(pp. 614-684),? give all the references to the literature regarding the 
recent, elevation of the coast, as shown by the raised beaches occurring 
at so many points of the coast. Maitland ? also speaks of the New Guinea 
terraces (raised beaches?) reaching to a height of 2,000 feet. They 
very probably represent, as they do in Cuba, elevations which have taken 
place in different periods. 
Speaking of the upper cretaceous formation of Queensland, Jack says 
(p. 511): “The desert sandstone formation . . . must at one time have 
covered at least three quarters of the colony of Queensland, — although 
its denuded remains now occupy lessthan one twentieth of the area over 
1 Tt may be that on Raine Islet we also have traces of such an elevated beach. 
See Rattray, Proc. Geol. бос. London, 1869, Vol. XXV. p. 303, who, speaking of 
Raine Islet, says, “It rises ten feet above high-water mark, and consists of hard, 
compact brecciated conglomerate.” 
2 Geological Observations in British New Guinea in 1891. 
