1881.] '^^'^ LWilder. 



In a short paper (17) the writer has previously urged the desirability of a 

 iiuiforoi position for anatomical figures, and suggested that the head end 

 should be always toward the left. As is stated above, while this seems 

 to be most advantageous for unsymmetrical figures, the symmetrical ones 

 are more easily understood and compared in the position which is usual- 

 ly given them. 



The obliquity of fig. 17 was necessary in order to show the Fissura liy- 

 pocampcB in its whole length. That such a position is undesii'able, as a 

 rule, may be inferred from the unwonted emphasis with which it was con- 

 demned by the late Prof. Jeffries Wyman : — 



"The photograph is from an oblique point of view, Avhich I believe people 

 will never learn to be a bad one. If the view had been full front, or full 

 side, or full anything, it would have been better than this." — The xVmeri- 

 can Naturalist, II, 52. 



Most of the figures are twice the diameter of the preparations, and, with 

 the exception of figures 1 and 2, it should have been better to make 

 the enlargement four or five diameters. Aside, however, from the greater 

 expense which this would have involved, such a degree of enlargement 

 would have rendered it not only possible but necessary to show certain de- 

 tails of structure upon which my information is, at present, imperfect. 



All of the figures have been drawn from my own preparations by Miss 

 G. D. Clements, B. S., at the time a student in the Natural History 

 Course in Cornell University. 



Artists and anatomists who have undertaken to represent the details of 

 encephalic structure understand the difficulties of the task, and will ad- 

 mit that the omissions and inaccuracies to which attention is called in the 

 descriptions are both few and unimportant compared with the general thor- 

 oughness of the work. Indeed, for all the deficiencies, I hold myself much 

 more responsible than the artist, by whom some of the figures were drawn 

 at least four times, twice ujion stone. 



Fig. 1. — The dorsal aspect of the brain. Enlarged two diameters. 



The general form and some of the fissures are drawn from prep's 288 

 and 289, the bisected brain of a white and Maltese 9 ; but the fissures of 

 the right hemisphere are derived from several different preparations. 



The Lohi olfnctorii {L. ol.) are made somewhat too prominent, but there 

 is considerable difference between cats in this respect, although much less 

 than between dogs. 



The general features of the cerehellum (cbl.) are well shown. The Lobi 

 laterales (L. I.) have only a fair proportion to the median lobe or vermis 

 (vm.), instead of the preponderance which they have in the human brain. 

 The latei'al contortion which characterizes the caudal aspect of the vermis 

 in adult cats (as shown in my paper, 10, 221, pi. i, fig. 1 and 2) does not 

 affect the dorsal part. 



Of the metencephalon (mten.), and myelon {my.), the following features 



