SCIENTIFIC SUMMARY. 
91 
5 ft., though in some places one could walk upright, and in others we had 
almost to go upon our hands and knees. The length has not been measured 
accurately ; hut our guide said it was 540 paces. It took us half an hour to 
get to the end, stopping now and then to look about, and twenty minutes to 
come straight out.” 
The Coal-Beds at Chanda , between Hyderabad and the Central Provinces, 
are said by the Times correspondent to be of a most inferior kind. Boring is, 
however, still going on, and Dr. Oldham expects a better quality. The 
anticipations of the survey as to quantity are not so favourable. The for- 
mation belongs to the Damuda series, which, with a thickness of several 
thousand feet, and more than a hundred beds of coal in three groups near 
Calcutta, thins out as it passes to the west, till at Chanda the coal-bearing 
formation has not more than 150 ft. There the coal is confined to a few 
beds of great irregularity near the base of the series. 
The Professorship of Geology in King's College. — The election will take 
place at the Council meeting this month (January). Professor Rupert 
Jones has retired from the field, but Dr. P. M. Duncan, F.R.S., is still a 
candidate. 
The Homologies of the Blastoidea. — A note on this subject is given by Mr. 
E. Billings in the last number of the Canadian Naturalist. It gives the 
following conclusions : — 1. That the tubular apparatus beneath the am- 
bulacra of Pentremites is the homologue of the so-called “Pectinated 
rhombs ” of the Cystidea ; that the five orifices heretofore supposed to be 
ovarian apertures were respiratory in their function, the larger of the five 
being also the mouth and vent ; and that the central aperture is not the 
mouth, but the homologue of the ambulacral orifice of the Cystidea and 
Palaeozoic crinods. 2. That in the summit of the genus Nucleoerinus there 
are sixteen apertures — ten respiratory, five ambulacral, and one which is 
both mouth and vent. There is no aperture in the centre of the summit. 
3. That Codaster does not belong to the Blastoidea. 
Mr. Mackintosh and Mr. G. P. Scrope on Sea-beaches. — Mr. Scrope is 
somewhat severe on Mr. Mackintosh : in a recent paper he says : — ‘(We all 
know what a sea-beach is. The Chesil bank is an admirable example. 
There is another stretching eastwards, along many miles, from the base of 
Beachy-head to Hastings. They are composed, like all sea-beaches, I be- 
lieve (differing in some respects from flat sandy shores), of rolled pebbles or 
boulders, with or without an admixture of sand, broken shells, and other 
sea- wrack. Has Mr. Mackintosh examined any of his ‘ raised sea-beaches ’ 
and found them, or even any one of them, to be so composed ? Not one ! 
j Has he produced a single sea-shell found in any of them ? Not one ! 
j Throughout his whole description of these numberless banks and terraces, I 
cannot find that he has even attempted to examine the composition of any 
— with the single exception of one of a i Series of Terraces near Llan- 
| gollen.’ ” 
< A Bust of Professor J. B. Jukes. — It is proposed to have a bust in marble 
of the late Professor Jukes placed in the gallery of the College of Science, 
Dublin. 
Flint weapons in considerable quantity have been found in Upper Egypt. 
