238 Reports and Proceedings— 
described by Mr. Hulke, are the largest and most perfect pelvic 
bones of a Saurischian known in this country. An examination 
showed that the bones of the right and left sides were united in the 
median line almost throughout their length by a median suture, and 
that they formed a saddle-shaped surface internally from front to 
back. After giving a detailed description of the pubis and ischium, 
the author stated that he was not aware that this type of pelvis 
had been previously observed. He noted that the antero-posterior 
concavity between the anterior symphysis of the pubic bones and 
the posterior symphysis of the ischia was a well-marked charac- 
teristic of Saurischian reptiles, but that it remained to be determined 
to what extent the median union of the pubic bones was developed 
in the group. 
It was impossible to judge of the form of the ilium from the 
imperfect fragment preserved, but it did not make any recognizable 
approximation to the bone in those American genera which offered 
the closest resemblance of form to the pubis and ischium. 
There were several minor differences of proportion between the 
bones from the Oxford Clay and those from the Wealden of the 
Isle of Wight, and the former differed in ways pointed out from 
Morosaurus, Diplodocus, and Brontosaurus, though there were re- 
semblances. 
I1I.—April 3, 1889.—W. T. Blanford, LL.D., F.R.S., President, 
in the Chair. 
The President announced that according to a circular lately re- 
ceived from the “Sociéte Géologique de France,” that Society pro- 
posed to hold its Extraordinary Meeting this year in Paris, the date 
being fixed for the 18th August next. Meetings will be held in 
Paris, the collections in that city will be visited, and there will be 
a series of excursions to places of interest within easy reach of Paris, 
on successive days of the week devoted to the Meeting. These are 
specified on the circular; and in the week following the Meeting, 
excursions will be-made to more distant localities, of which the 
Auvergne and Brittany are particularly mentioned, that to the 
former district under the guidance of M. Michel-Lévy, and that to 
Brittany conducted by M. C. Barrois. Arrangements will be made 
with the railway authorities for a reduction of 50 per cent. upon 
the fares; but in order to secure this advantage the names of persons 
intending to attend must be sent to the Secretaries of the Society 
before the Ist July, 1889. British Geologists, and especially 
Fellows of the Society, are cordially invited to be present. 
The following communications were read :— 
1. «The Elvans and Volcanic Rocks of Dartmoor.” By R. N. 
Worth, Esq., F.G.8. 
The object of this paper was to give reasons for the belief that the 
present granite of Dartmoor passed upward into felsitic and volcanic 
rocks, remnants of which are to be found in the Triassic conglome- 
rate of Devon, in the detritus of the bottom lands of the moor itself. 
on the beaches of the channel, and in ancient river-gravels and 
pebble-beds ; to indicate the wide range of character taken by the 
