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Huxley, on the nature of the atlas and axis in Plesiosaurus; and early in 
the same year he himself discovered the remarkable condition of the atlas 
and axis of Pterodactyle ; and a little later detected, in the Upper Green- 
sand, the remains of small birds, on which a communication was made to 
the Cambridge Philosophical Society. About this time he occasionally 
lectured for the Wood wardian Professor ; and the wants of the class turned 
his attention to field-surveying, which in 1859 bore fruit in the excellent 
geological map of the Cambridge district. 
In the previous October he became an undergraduate of Trinity College, 
but kept only one term ; for in March, when but twenty-two, he was 
appointed by Sir II. Bulwer to the important office of Director of the 
Geological Survey of the West Indies. He now married, and within a 
month left England for Jamaica. Here was a field of usefulness every 
way worthy of his genius, and right heartily did he set about his new 
duties. 
As was to be expected, the survey progressed rapidly, and he speedily 
communicated to the Geological Society a paper on some important 
features in the geology of the island. His duties carried him into wild 
unvisited parts of the country, and those who have listened to the mar- 
vellous story of his adventures in the land of the Maroon ghosts will 
regret that he wanted the literary faculty (or inclination) to have given 
us, as he might have done, as remarkable a book of travels as any of 
modern times. 
Among his discoveries was a singular new fossil, named after him, by 
Mr. Woodward, Barrettia, but much against his wish. Dredging again 
was carried on actively, and among the more important results was the 
discovery of an Arctic fauna in the deep cold waters of the Mexican Gulf. 
In the spring of last year he returned to England, bringing the result of 
nearly three years’ work in geological maps, and a large series of West 
Indian produce for the Great Exhibition. He remained till October, 
working incessantly ; now at astronomy, now analyzing West Indian 
minerals, now preparing his first volume on Jamaican geology, and, after 
attending the British Association, and taking an active part in the meeting, 
returned to J arnaica full of hope. 
Feeling of what little value much of our knowledge is from so little 
being known of the ways of life of animals on the sea-bottom, he took out 
with him a diving apparatus in which to watch their habits, and especially 
to examine the coral-reefs. On the 17th of December, four descents were 
made in shallow water in Kingston harbour; and the following day he 
expressed to friends in the House of Assembly, where he was giving 
evidence before a Committee, the greatest delight at what he had seen. On 
the 19th, against all advice it is said, he determined to go down in deep 
water; and, as no white man was there to accompany him, pulled off with 
six negroes ; and, having arranged everything himself, descended outside 
the Caps, near Port Royal, taking the signal line in his hand. For twenty 
minutes he gave no signals, and it was then found he had parted from the 
line. Unable to regain it from some cause, probably the effect of pressure 
of the water consequent on a rapid descent, he appears, as a desperate ex- 
pedient, to have closed the escape valve of the air tube, and shortly after-. 
