609 



ADDENDA et CORRIGENDA. 



Page 12, line 3, for Med., read Ned. 



Page 56, heading of third paragraph for 1, read I. 



Page 59, line 21, for § 16, ?va<7 § 14. 



Page 59, heading of second paragraph, /or &, r^ac/ II. 

 „ „ „ „ third „ for I, read a. 



„ 60, „ ,, first „ for m, read b. 



Page 143, in § 77, insert the folloicing: — Some authors dis- 

 tinguish two kinds of sarcous elements in the muscular nhrillse, 

 the one dark and the other light. This view, adopted by Dobie, 

 Harting, Ildckel, Rollett, and others, has received strong con- 

 firmation from the observations of Briicke, that the darker elements 

 are double-refracting. There can be no doubt, that, in many cases, 

 dark and clear spots are seen regularly alternating in the course of 

 a fibril, the darker portions only being the sarcous elements of 

 Bowman; but this fact cannot be held to prove any essential 

 difference of nature in the two portions which enter into the com- 

 position of a fibril. I regard the fibrillee as consisting of one single 

 kind of substance, everywhere equally contractile; and the dark 

 and clear spots as being only thicker and thinner portions of this 

 substance, formed in the process of contraction. This difference 

 in density appears also to explain the unequal rapidity with 

 which the two portions are affected by chemical agents, hydro- 

 chloric acid for instance. 



Page 150, line 16, for rectinacula, read retinacula. 



Page 178, in § 94, insert the folloicing: — The soft centre of the 

 intervertebral ligaments consists of cells, which are obviously de- 

 rived from the cells of the chorda dorsalis of the embryo. In 

 newly-born infants and in children, these cells are contained in a 

 special pyriform cavity with a definite boundary. 



Page 184, line 4, for and those of fossil animals, read and some- 

 times even those of fossil animals. 



Page 275, for the description of Fig. 113, substitute the fol- 

 lowing, from Todd and Bowman : — 



A. Vertical section, near the middle of the dorsal surface of the tongue ; o, a. fungifor.n papillae ; 

 6. filiform papillae, with their hair-like processes; c. similar ones deprived of their epithelium ; mag- 



R R 



