ERRATA AND ADDENDA. 



10, 9lh liue,/or "centra" read "centre." 

 ,, 83, 5th line, for " when " read "where." 

 ,, 136, in Fig. 109, SR sliould indicate the space below DXf, and the line from A 



should point to the layer indicated by SR. 

 ,, 249, Fig. 203, for " Siluris " read " Silurus." 



Insert under Bibliography : 

 On p. 160 : 



GHAAF, HENRI W. UK. Zur Anatomic und Eiitiricki:lnn<j d>'r Kpi]->lnin(. bei 

 Amphibien und Rcptilien. Zool. Anzeigcr, IX. Jahrgang, No. 219, 1886. 



:, W. BALDWIN. The Parietal Eye of Hatteria. Nature, May 13th, 

 1886. (Do Graaf shows that the epiphysis really corresponds to an un- 



bus ' 



si-nsi'-organ, and i\[r. Sprnn-r bus 1'uuinl a well-developed nu-dian 

 in Hatteria and other Lixanls. Compare p. 133 of this book. > 

 JOHNSON, Auric, and S]ir.u>N, LILIAN. <>n . th- ]> //"// nt <>f the Cr-- 

 in the Newt. Proc. Hoy. Soc. 1886. 



On p. 2! I : 



I'AKKKH, T. JKI -KKKV. 0,1 the Blood- Vessels of Mustnlns antarcticus. A Con- 



trihiitioii tn //!> Mi>,-fi/in/,i : /!/ of the Vaxculnr .SV/,-//i in the Vertebrate. 

 Abstract in Proc. ROIJ. >'-. 1886. (Not yet published in full.) 



