MR. W. K. PARKER ON THE OSTEOLOGY OF BALAZNICEPS REX. 271 
5. Descriptive Catalogue of the Osteological Series contained in the Museum of the 
Royal College of Surgeons of England, 1853. 
6. Principal forms of the Skeleton and the Teeth, in ‘ Orr’s Circle of the Sciences,’ 
1856. 
Professor Goodsir’s profound views upon this most difficult and tangled subject will 
be found in the Edinburgh New Philosophical Journal for 1857, in an Abstract of 
Papers submitted by him to Section D. at the Cheltenham Meeting of the British 
Association, August 5—12, 1856. 
Professor Huxley’s opinions are published in his invaluable Croonian Lecture (in 
which are to be found several references to valuable works on the subject by Germans 
and others), published in the Proceedings of the Royal Society, Nov. 18, 1858 ; also in 
his paper on Stagonolepis robertsoni, Quart. Journ. Geol. Soc. vol. xv. 1859. Other 
important papers of Professor Huxley’s are to be found in the same Journal, vol. xv. 
for 1860; namely, an account of some Amphibian and Reptilian remains from South 
Africa and Australia,—on Rhamphorhynchus bucklandi,—on a fossil bird and cetacean 
from New Zealand, and—on the dermal armour of Crocodilus hastingsie. 
Dr. Humphry’s beautiful work on the “ Limbs of Vertebrate Animals,” 1859, and 
Messrs. Strickland and Melville’s description of the Anatomy of the Dodo and allied 
forms, in their noble work on the Dodo, 1848, will both be referred to. 
The late Professor MacGillivray’s works on the Birds of Great Britain ; the excellent 
articles on Anatomy and Natural History in the ‘ Penny Cyclopedia’; Griffith’s and 
Pigeon’s translations of Cuvier’s works; and the late Dr. Johann Miiller’s Book 
‘©on Generation,” in his ‘Elements of Physiology,’ as translated by Dr. Baly, will all 
yield us some assistance. Those long-beaked mammals, the Cetacea, are profitable for 
reference when we consider the structure of birds; and an admirable article on these 
creatures will be found in Todd’s ‘ Cyclopedia of Anatomy and Physiology,’ by 
M. Frédéric Cuvier. 
There is a very important and valuable paper by Dr. John Cleland in the Edinburgh 
New Philosophical Journal (vol. xii. No. 2. p. 242, October 1860), “‘on the Vomer 
in Man and the Mammalia, and on the Sphenoidal Spongy Bones.” ‘This is a model 
paper for unbiassed observation, and freedom from that pleasant mode of supposing 
instead of ascertaining what is the true nature of an anatomical element. 
Occipital Region of the Skull of Batznicers. (Pl. LXV. fig. 3.) 
The shape of the occipital sclerotome of the Balzniceps, as seen from behind, is sub- 
pentagonal ; the upper margin is formed by two tubercular ridges, which meet at a very 
obtuse angle above, at the mid-line—the part from which the small crista occipitalis 
passes downwards. The lateral margins are vertical above, but turn inwards below, 
curving downwards, inwards, and forwards. ‘The basal line is concave, being arched 
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