16 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Nov. 10, 
known ordinary form, which occurs in several examples, and another, 
in one quite young. The difference is very considerable, too great, 
T suppose, to be explained as a mark of age. 
«‘ There are two forms of scapula, both very large : the largest (one 
example) is separate from the coracoid; the others (several) are 
joined to the coracoid by synostosis. You will see the differences 
in the drawings. Iam disposed to admit the larger specimens as 
belonging to Cetiosaurus, of which one huge femur (Cetiosaurus 
gigantzus, Owen) was found in a deposit not much differing in age, 
at Gibraltar, north of Oxford. 
“¢ We haveseveral specimens of metatarsal bones from Stonesfield— 
Megalosaurian no doubt. Lately there came to hand three meta- 
tarsals from the Kimmeridge clay of Swindon, which appear also to 
be of the same reptile. These were in apposition, cemented by a 
thick crust of selenitic crystals. These have now been removed, 
and the bones appear clear. 
«Tt seems to me that these three bones were all that were in the 
metatarsus, and that the creature was tridactyle; but of course 
there may be reason not to trust too much to one case for proof of a 
negative. Still that seems to me the probable inference. As we 
have plenty of information about the femur, tibia (fibula?), meta- 
tarsals, and claw-bone, the reconstruction of the animal seems now 
practicable. But we want in this museum information as to cer- 
vical* and anterior dorsal vertebre, and the central part of the sternal 
arrangements: of ribs we have sufficient examples, from anterior 
very short bicipital ribs, to very long arched widely bicipital 
ribs about the middle of the body, or, rather, a little before the 
middle. The Marswpiala do not appear to me to offer any special 
resemblances to any of the Megalosaurian bones. Among reptiles 
Crocodiles furnish the most analogous forms, among birds the Stru- 
thionde. 
«‘ Wishing you well through the Deinosaurians, 
“ Believe me, ever yours truly, 
“‘ Joun PHILitps.” 
On the 7th of February, 1868, I published the chief results of 
the studies to which Prof. Phillips gives his benediction, in a lecture 
“On the Animals which are most nearly intermediate between 
Birds and Reptiles,” delivered at the Royal Institution, and subse- 
quently published in the ‘ Proceedings’ of that body, and also, with 
the addition of sundry illustrations, in the ‘Popular Science Re- 
view.’ But in this lecture I drew my illustration of Dinosaurian 
structure almost wholly from Jguanodon. My reason for this was 
that Zguanodon was the only typical Dinosaurian of which the re- 
mains of the greater part of the body of a single specimen were asso- 
ciated together, while, at the same time, detached bones, all the 
peculiarities of which can be clearly made out, are numerous. 
The conclusions at which I had at that time arrived are thus 
enunciated :— 
* Professor Phillips has now (January 1870) obtained a cervial vertebra. It 
suggests a smaller head than was calculated from the known portion of the 
lower jaw. 
