228 Royal Astronomical Society. 
lived on the roots of water-plants, &c. They are covered with a 
thick coat of enamel, and were concealed for one third of their 
length in the sockets; they are also stated to be large in proportion 
to the size of the skull; and the bulb is said to resemble that of the 
foregoing variety. 
Mr. Koch then calls attention to some vertebre in his collection 
belonging to a gigantic animal, but to neither the Mastodon nor 
the Elephant. They consist, he says, of an extremely well-pre- 
served lumbar, and a second cervical vertebra. The most striking 
character of these bones is stated to be the great size of the foramen 
in reference to the smallness of the body, the former being double 
the dimensions of that of the Mastodon. The author also says that 
the cervical vertebra presents two peculiar “ cavities, situated on 
the right and left of the root of the toothlike process,” and which he 
‘ considers to have been for the reception of two unusual muscles, 
to enable the animal to perform a peculiar motion with the bead.” 
As he found these vertebra in the same deposit from which he ob- 
tained the skull and jaw, and as he conceives that the Tetracaulo- 
don must have possessed the power of moving head and neck in a 
peculiar manner whilst grubbing for its food, Mr. Koch believes that 
these vertebre belonged to that animal. 
ROYAL ASTRONOMICAL SOCIETY. 
Dec. 9, 1842.—The following communications were read :— 
I. A Letter from Professor Henderson to the Secretary, on the 
Parallaxes of certain Southern Stars.—This will be found in the 
Monthly Notices of the Society for December 1842, vol. v. p. 223. 
II. Observations of the Beginning and End of the Solar Eclipse 
of July 7, 1842, communicated by C. Runker, Esq. in a letter to 
Dr. Lee. 
III. Occultations observed at Yarmouth, by Arthur Utting, Esq., 
communicated in a letter to E. Riddle, Esq. 
Abstracts of the two preceding communications will also be found 
in the Society’s Monthly Notices for December 1842. 
IV. Sequel to a paper “‘ On a new Method for greatly facilitating 
the Computation of the Moon’s Co-ordinates.” By S.M. Drach, 
Esq. 
The object of this paper is to present, in a practical shape, the 
transformation of the lunar equations which had been suggested by 
the author in his former paper for facilitating the computation of 
the moon’s co-ordinates. Though the facilitation did not reach the 
extent at first anticipated, still it is hoped by the author that much 
labour will be saved to the computer of the places of the moon by 
the use of the method proposed. 
The paper is accompanied by two skeleton forms, representing 
the details of the computations necessary for computing the co-ordi- 
nates by the use of the tables proposed by the author. 
Jan. 13, 1843.—The following communications were read :— 
