iv PROCEEDINGS OF THE 



(3) G. B. Howes exhibited some reconstructional models of the 

 developing skull of the Tuatara {Sphenodon puncfatus), produced in 

 the course of a couple of years' work upon the skeleto-genesis of that 

 animal by himself and one of his pupils (Mr H. H. Swinnerton), upon 

 which a fully illustrated memoir is to immediately appear in the Trans. 

 Zool. Soc. He also exhibited specimens of the young at the stages dealt 

 with. Giving an account of the work, he dwelt more especially upon 

 the dermal skeleton of the hand and face in its bearings on questions of 

 phylogeny, and upon the chondro-cranium, as supporting Huxley's 

 conclusion that the trabeculpe cranii are a pair of prpeoral visceral arches. 

 Explaining the method of ' reconstruction,' he adverted to the fact that 

 the pioneer in that department of research is TuUy Newton, the Eng- 

 lish palaeontologist, and that his work is memorably associated with 

 Huxleyean traditions. 



(4) Professor A, Macalister, F.R.S., Specimens sJiotoing the styloid 

 process of the Ulna as a separate hone. 



(5) Professor B. C. A. Windle, F.R.S., Three specimens of Double 

 Monstrosity in Kittens. They showed the influence of the point 

 of apposition of the two converging Hues of development upon the 

 subsequent rotation of the embryos, and consequently upon the 

 ultimate position of the neighbouring limbs. 



(6) Dr T. H. Brtce. — Professor W. E. Thomson's specimens of 

 the skulls of young rabbits, in Avhich one eye had been enucleated, 

 demonstrating that the removal of the eyeball led to fmilty develop- 

 ment of the orhit. 



(7) Dr Walter Kidd read a paper on The Meaning of the Hair 

 Slopes in Man. This paper appears in the next number of the 

 Journal of Anatomy and Physiology. 



(8) Dr W. H. Gaskell, F.R.S. , read a paper on llie Origin of the 

 Vertebrate Eye and the Meaning of the Second Fair of Cranial 

 Nerves, of which the following is an abstract. The paper will appear 

 at length in the Journal of Anatomy and Physiology. 



Dr Gaskell pointed out that all eyes were divisible into two groups, 

 those with a simple retina and those with a com[)Ound retina, the latter 

 consisting of a simple retina to which a part of the brain, the retinal 

 ganglion, was added. In both groups, the retina and the portion of 

 the brain known as the optic ganglion are formed at first in close 

 contiguity, and in both groups the brain withdraws from the surface ; 

 the difference being that in the first case the whole brain, inclusive 

 of the optic portion, withdraws, leaving, as communication with the 

 retina, the optic nerve ; in the second case, a portion of the optic 

 ganglion, the retinal ganglion, is left behind in close connection with 

 the surface, to form the compound retina, the rest of the brain with- 

 drawing, and thus leaving as communication with the compound 



